Strength & run half-marathon plan

Is your objective to complete the distance or to achieve a particular time?

You could do HM training on three runs per week, as long as you're not to worried about your performance.

Looks pretty gentle on low mileage, so it shouldn't be a huge issue. The only caution I'd have is that in the higher distance weeks the balance of long run to shorter runs is a bit off, but that only affects a quarter of the time.

Just avoid a big leg day before the long runs.

I basically did this. I do strength training/HIIT (CrossFit) 3 times a week and used to run a 5km once a week. Decided to do a 15km run with a friend and easily upped my mileage to 10 miles, I then decided to do a half marathon with the same friend, from the 15km (hill run) on 29th March to doing a Half Marathon 25th May I was comfortable doing a long run only once a week 10-12 miles. Finished in 1:59:11.

I did listen to some advice and checked training plans to make sure I was on schedule, but my advice is listen to your body, you sound like you already have a good fitness base so maybe look at doing a longer race than a 10km as a measure, but like the other advice try not to do too much leg work on consecutive days and rest when needed.