my birds main cage is in front of our main window! nothing wrong in that that i can see, and if its not, she plays holy hell, even out of the cage
if you can cope with knowing this bird will always look ratty and have the space and can offer it a stable routine for it, that allows you to spend some one on one time with it, till its settled (took months for the nut to settle with us) then why not add it??
(after a through vet check, to be safe)
also ppl are not always overly honest when they want to get rid of a problem animal, so don't let sad stories pull on your heart strings
and welcome to the forum and pics please