That's it. you really need *at least* one decent mid size saw (I will call mid size anything 50 to 70) and a backup craigslist poulan or two. Minimum.
I went from that one dinky saw to now quite a few, out to 94cc. And funny thing, you wind up using them. I just keep scrounging them up and fixing them. I haven't sold any, but I also like swapping around sometimes, and it is fun to work on them, and more fun to use them, plus, it is practical. like you said, in your community, comes an emergency, all the saws in the area and more will be needed.
Good luck and better skill with whichever one you pick out man! And get the protection gear!