Attic Fan or save for A/C?

[newracer]

Get a large window unit swamp cooler, put it in a ground floor window near the outside water faucet, or run a cheap flexible plastic line like for a refrigerator, and open the upstairs bedroom window. Initial cost around $450,Cools just as good as A/C and quicker, electric bill stays low and you can take it with you when you move.

I did this for about 10 years and three rentals, then donated it to Habitat for Humanity when we bought a home which central air.

^^^^^ I agree, a window mounted swamp cooler is the best option for short term. I did them same for two different houses.