Drawing in outside air at night in AC loop

I've seen a couple posts about this, but I'm not really sure what the best way to set this up would be. I basically want to add a residential version of an economizer to my AC system. I don't like the idea of a whole house fan, since I'd have to open the windows when I want to use it, and it usually doesn't cool off to my desired sleeping temperature (72-73F) until a few hours after I go to bed, so I'd really like my ecobee to just switch to blowing in outside air when it get cools enough. The really big problem is the humidity; it's 90+% overnight since I live in the south. Would drawing in outside air and dehumidifying it be any more cost/energy efficient than just running the AC at night?

Thanks!

submitted by /u/Archa3opt3ryx
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