defo i would, go with 2F and 4 male but thats me, aslong as you keep up with weekly water changes its fine, i had in a 12 gallon, like 8 guppies, 4 albino cories and some neons. Its was all fine and the guppies had loads of babies. The snail wont really add to your bio load you can get as many (within reason) as you want.