I'm thinkin if you could get rid of some babies in your 29 gallon you'd be set. Could you sell them/move them to the 10, etc? I don't know your situation, but maybe there is something you could do. The gouramis need at least 20 gallons, and you won't be too stocked if all you have in there are parents and tetras. They get to about 4 inches, and I'd suggest getting a pair. Let us know if you do pick up any!
The ten gallon is FULL of snails and not the most pleasant tank. Lol, I keep it in the laundry room. Not fit for babies!
I was thinking my 26 gallon? maybe? I don't know how the paradise fish would act but i think it's a female paradise so I don't think it would be aggro with a male gourami.