Fan or Air conditioner (Lincolnton, NC)

I live in the attic and my sister's house and the air conditioner went out and I'll have a little one and it barely cools the upstairs off in desperate need for a fan or even maybe another small air conditioner or just a big one would be awesome almost 50 but it gets really hot up here and if anyone does have one that I can get I would really appreciate it thank you in advance and God bless you.