Why would you do SWAT training? I thought you just finished your script? You should take a break, then work on basic pre-production processes (if the film is going to be made by you), or you should be looking around for people wanting original scripts. By the way, you should hire a stuntman or a professional to teach them. Or you could take the LOSSES route, and have the actors doing slow, safe movements made to look amazing with choppy editing and fast camera movement.
I don't know if you should wait a few years. Unless they are tight buddies of yours, they'll most likely forget about the project. What are you up against? Competitive filmmakers.
If you do not have the money to pay for travel expenses, use the one actor! And I would go with what that guy wants to do. Cut it down to a short. You do not have the experience to make a feature yet. You said by making this a short, all of the best parts will be taken out and the film won't be as good. That's okay! When directors have to send out their final cut, sometimes they have to do a thing called "killing their baby", which is basically taking out the most expensive scene, the best scenes, that one twist, and that cool shot. You have to learn to do that to if you want to be a filmmaker. It seems like you were mentioning El Mariachi a lot in previous threads (maybe even this one). Even thought it is not a good example for budget, there were a few good pieces of advice in that book. When his movie was going to go to theaters, he cut out 15 minutes (including a scene he liked, a bloody gunshot effect, and a crap load of filler). Kill yo' babies.
Losses is not a good example. Ryan Connolly is right about one thing: You can create awesome stuff on a low budget. But do you know what the budget of Losses would be if he did not have the gear and connections he had? He had some Lowel DP lights, a Red Epic, cinema lenses, a shoulder rig, Premiere Pro, After Effects, ADR and Foley mice, and other crazy expensive sound equipment. Props as well. Over 15 (expensive) fake guns, and costumes. Ryan had a good sized crew, and a large cast. He didn't make LOSSES for cheap. If he did not have the connections he did, he would have spent A LOT of money.
Sure? Primer had OK sound, but nothing very good.