The Right Thing To Do?

Hello. There's something I've been wrestling with and I'm hoping that ya'll might have some input. My fiance and I recently moved into our first home and there are 3 stray cats who've been coming around. I can't turn a blind eye to stray kitties, so I've been feeding them. Of course, I'll be trapping them to make sure they're neutered and to get shots for them. I'm just waiting for them to trust us enough to do so. The thing is, we have 4 indoor kitties and these outdoor kitties seem way too feral to take into our home. What I'm worried about is this... I'm afraid that if I feed them every day, when my fiance and I have to move they'll have grown too accustomed to being fed at our house. He's in the military, so I'm sure we'll have to move at some point. I'd considered the possibility of taking them with us when we move, but I'm afraid that would be a bad idea. If they're used to living only outside, in this area, I'd be afraid of taking them away from their accustomed territory. I've also considered only feeding them sporadically, so that they won't be too used to getting food at our house. That idea makes me feel terrible, though, because they're always so hungry when I see them. This is something that I've really been worrying about, so I'd really appreciate any advice. Thanks. Melissa