yeah its definately tank set up, and luck!
Years ago you used to see a lot of 'gourami tanks' as their oxygen demands were low and thei swimming technique allowed good viewing.
I remember tanks with moonlight, croaking, opaline, dwarf and honeys all in together.
I've even seen some full grown kissing and giant guoramis, in ahuge planted restaraunt tank, surrounded by smaller 'shoals' of mixed gouramis.
However, I also remember from ymown experience how just one rogue fish, or one maturing adult, can become pugnacious or even violent, and terrorise the tank. So I think if you want to try it, have a sopare tank on stand by to remove victims/aggressors.