When you say you want to make it yourself and that you're handy - are you talking "pintrest handy," or are you actually handy?

If you can run a chop saw and a welder, I can send you drawings for a homemade live trap. If not, then the best advice I can give you is to rent one from a local exterminator, or buy a "Hav-a-Heart" live trap from any farm supply store.