If you can return or sell the AC units he got you to purchase, then just install gable attic fans for exhaust. The more you can, the better. home depot has some that are 1300CFM for ($80ish) but you can find some 3000 CFM ones on Amazon for good price and have multiple of them. The 2 I have use 2.8 AMPS each compared to what AC would be. plus you wont have to worry about condensation issues in the future from possible humidity.