Building a squat rack?

check craigs list and include "power rack" in your search as well

Here are plans for a wooden one. I would still recommend buying, not building.
http://www.home-gym-bodybuilding.com/homemade-power-rack.html

http://www.sherdog.net/forums/f13/building-my-own-squat-rack-pictures-776375/

http://tnation.t-nation.com/free_online_forum/sports_body_training_performance_bodybuilding_strength/building_a_squat_rack_1

Unless your husband is really, really handy, buying a used rack is such a better option. I'm in LA, so it's a ridiculously large, fitness oriented market and I know it's not representative of the rest of the country. But there is a used rack on sale here for $90, a power rack for $300, and rack with full set of bumper plates for $650.

I would hold tight and keep checking for something like that in your area. Heck, I might even place an add. If your rack isn't ONE HUNDRED PERCENT sturdy and reliable it could lead to a terrible, terrible mishap. I'm not sure I'd want to use a wooden one no matter how it was built.

If you need to ask us how to build a squat rack and what materials you need, then I would not suggest having your husband build one. He would need to have known all that info already. I understand because my husband is a physicist and he designs and builds large machinery, so when he offers to build something it is because he already knows how to do it and has all of the resources available through his work.