daveedka said:
Yup,
It will take roughly 60 days to raise your fish count well over 100
I have to disagree with this. Yep, they'll breed fast, but in a tank that small, most of the fry will get eaten, so you numbers will be kept down.
It wasn't really clear from your post whether you
want lots of fry or not. If you just want guppies because they're pretty, then get a few males (up to 5 in a 10g). You could get only females but they're generally not as pretty and they might already be pregnant when they arrive.
If you'd like a few fry, but not hundreds, feed them flakes. Mine don't breed very fast at all, as I never give them live food.
If you want to breed them successfully, one 10g tank won't do. As a minimum, you'd need a separate tank to house the fry (breeding traps can work, but you might lose a female due to stress, and the fry probably won't grow very well in them).
Before buying guppies, I'd suggest that you check out
http://www.guppies.com. It's a similar site to this, but deals specifically with guppies.