I'd say pull it. So your teeth aren't perfectly straight... who cares? (Yes, I am a Brit LOL!) I've had various teeth pulled and now my mouth is too weak for any corrections, but usually you don't notice the gaps, even the loss of a canine tooth - oh, I had 3 teeth pulled from one spot over the course of 2 years, last pulled out 9 years ago, and there's still a gap: despite being told my teeth would move to fill in the gap, there's still a good-sized hole there. If it's not a front tooth, get it pulled. You can always get a fake tooth to put in there.

Of course, you could do a charity-style event to raise the money, like a 20-mile walk or something and get friends/family/neighbours to sponsor you... or the children, people sponsor children!