Let me put it like this, get rid of the angel by any means neccesary( dont kill it though) and you wont have to call th lfs if you said a friend has a 50g for it. You can keep the gourami( they can be aggressive) and get 3 corys and you are done. 10g tanks are hard to work with becasue tyou can tbarley anything into them. If it sounded a bit harsh, I am sorry, you seem to be asking the same questions over and over again and you wanted to know how long a angelfish lives for, if you arent keeping it, does it really matter? I hope everything works out for your tank.