55 Firemouth Stocking

I'm getting a new 55 in a few days, and I was wondering what I could put in it. I have a male adult firemouth, a female juvenile firemouth, about 4 platies, 2 cories, and a snail in two 10 gallon tanks, and I was wondering if I could combine the two tanks into the 55, obviously building a few caves and etc. for hiding. Would it be possible to accomplish this?

I also failed to mention that the Male Firemouth is about 5", and the Female is 2" long...