So, I know all my questions here tend to be along the same lines... I'm still trying to figure out a way I can afford to keep my wife and I warm in a hammock without breaking our tiny bank.

Do you think I could modify this sleeping bag into a peapod sort of device?

I imagine It'd go around the hammock but under the ridgeline. Like this:

I'm about 5'11", and have relatively broad shoulders... but I'm not a huge guy.

I'm also considering making my own KAQ, or making an UQ/TQ system out of down sleeping bags if I can find used ones for >$60. Going to be making a lot of gear through the winter... And the cost and effort of anything is going to be doubled since I'll be making one for the wife as well.