Look for a 2nd hand 2ftr on tm, that would be good for her and as a growout. Still think you should rehome her peacocks are harem breeders 1 male to many females, not 1 female to many males. If you keep her in the current tank with all those males it will turn into carnage. I kept an all male peacock/hap tank and had trouble keeping that setup calm, you have basically an all male peacock tank with a single female not a good ratio.
Sorry but you have some nice peacocks which are new to nz to me if she survives in that setup you are gonna end up with a whole lot of hybrid fish which even if you label as hybrids if you sell them its just adding more rubbish to our pool of fish. Not trying to tell you what to do just expressing my opinion, hope I don't offend.