I seriously can not find the time or place to workout and really would like to!

We're working on finishing our basement (ourselves, so it's going to take a looooong time), and when it's done, I'll have the space for my treadmill and pilates reformer. Until then (and again, it's probably going to be 6m to a year before that's done), I have no idea where and when to work out in my house. I don't have the time/money/caregiver to go to a gym, and I'd most likely work out either when the boys are napping or when they've gone to sleep.

So, where and when do you work out? I'm a working mama, so there just doesn't seem to be any time left in my day!