Lifting traditional reps 5-15, sets 2-5, and rests 2-4 min - calorie burn in studies is about 3.5 METS, or 3.5 x resting metabolism.

For walking to burn the same, it would be about 3.3 mph level.

But very true that is during the workout time. Ain't no repair needed for walking to burn more over 24-48 hrs later.

I'd suggest lower slightly - life lesson after all, eating correctly for level of activity. Maybe 100-200 depending on daily activity level with no lifting in there.
Or walk faster and more incline and eat the same.

You'll lose glucose and attached water first in the muscles - which should make them look smaller and perhaps lose some water weight too since not needed.
That should take a couple weeks.

Strength will be gradual loss also, probably take 2 weeks to start losing strength over the next 4 weeks, slowly.

May not lose any muscle mass during that 4 wks if not in deficit and enough protein.

All the hard work won't be undone. Perhaps prior 2 weeks worth is what I've seen estimated per 4 weeks non-use. Still being active with the muscles though not lifting is what is needed.
If total bed rest like coma - ya, that's faster.

So body weight the motions if possible - everything.

And don't use weight loss as indicator of eating at TDEE - you should lose water weight.
Blood volume should go down too, along with that unneeded stored glucose with attached water.
Of course that all is a loss of LBM (not muscle though) and therefore metabolism, since water management is big part of metabolism.

But your plan will help using the muscles.

Body doesn't adjust that fast - head on up!

That's the problem with big jumps going up when it's already running slow, the extra is just fat gain then until body decides to speed up.

A month is too long though for such minor increases - that'll take forever.

Only minor needed is at the start from increase of really low level - which you weren't there, so doesn't apply.

The drop of extra stored carbs just depends on genetics and if your body thinks you'll need it anyway.
I've seen it take a month when I've gotten injured or my normal winter sickness.
A month of no weight change, but obvious increase in gut fat (beer-belly genetics), and then I'll start to increase weight after that. This is when I of course failed (or didn't desire) to decrease intake.

Good call wanting to get benefits of reset even if not the training you desired.

As I got time, it's nice to feel like all the studying and research isn't going to waste on just me.

You could still do a 25% day once per week - nothing magical about 2 x weekly, except it makes the average weekly deficit 22% and that's not as slow weight loss.
This also plays in well to the fact studies have shown the first 72hrs of an actual fast the metabolism actually increases, mainly in first 24. Takes a nose dive after that though, and tough for exercise to be included. So those 25% days benefit from that effect also.

Muscle resting metabolism is about 5.9 cal/lb/day, and that includes any carb water management. And that's muscle mass - not the bigger LBM that muscle is a part of.

The 4 biggest metabolically active organs account for 97% of the resting metabolism. Here's one such recent study. Others indicate the differences between races.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2980962/

The water management stands out for folks that do the very low carb diets.
Initial big water weight drop, and unless they went from super high sodium to super low - that water drop is mainly from less stored carbs and water.
And if they track well before/after the change - they almost always discover the weight loss is not as great as they would have thought eating the same calories as before. They could lose 200 cal off their TDEE by that change. Usually though they eat even less than prior deficit.
But usually they are taking care of other issues that low carb may help with - satiety, insulin issues, ect.
Now that's about max amount you'd likely be able to lose - 2 lbs of water weight and management of it.
Plus if you follow like the Paleo ect diets, they recommend no long cardio anymore, so now blood volume drops too since you don't need as many red blood cells for getting oxygen for aerobic fuel burning.

It's very interesting when you read what can/should happen - and then people indeed observe the same thing.

That's what I mean by your RMR isn't going to drop that much, not that you could observe it probably.

Nothing too dramatic - you are still being active which is great.

If my workout schedule allowed - I'd do one day eating at 25% of avg weekly TDEE, other days at TDEE.
That gives a weekly avg deficit of 10.8%.
I usually have 1 super calm day a week that would fit with eating very little, sadly it follows a day that is usually a hard workout in the evening - so it would never work.

That would allow for great workouts and recovery and changes from them. Keep body's levels of hormones in check.

You wouldn't want that day as recovery day to hard workout when body wanted nourishment.

The effect on hormones would be different between daily 10% deficit, and just one day deficit.

Hormones could eventually be effected by a daily 10% cut. That's minor and it could take awhile. Depends on other life stresses to the body too and genetics.
Some people seem to have a metabolism and daily burn that respond fast - sadly both directions.
Others are slow both directions.
And the worst - fast adapting when dieting, slow when coming back out of diet.

But the study on the 5:2 diet showed they were not getting hormone effects. So 1 day at 25% TDEE surely not.

Sorry so late - any use of the muscle with a reasonable deficit is enough to tell body you want it - with enough protein.

3 legs to that stool of no muscle mass loss - reasonable deficit, resistance training, enough protein.

So high reps/volume will help retain muscle - just not the strength you had.