Excellent, my snails are indeed Ramshorns, or something close to that. Is there anything wrong with letting my guppies breed freely, even if they just eat the babies? My tank is pretty full, but if any babies survive, I'll just sell/give/trade them to the LFS and get more plants...sound like a plan?Sounds more like a ram's horn. My clown and yoyo loaches are fine with the plants as long as their rooted.
Sounds like you have plenty of fish in there already - I'd want to turn in the gourami (the LFS should take him), get down to 5 male guppies (males so they don't multiply), and add 3 chain loaches. Then start saving your pennies for that 20!