Humidity causing issues in SFH --what do I do?

[Ken Swearengen]

I have a rental property in Kansas City (I'm out of state) that I purchased from a turnkey company. I've had a good experience with them; they've paid for a couple issues that they missed when they turned the property over to me.Late last week I got an email from the maintenance manager at my property management company where the tenant had called because they were having trouble keeping the house cool (68-70 degrees) and it was also causing condensation to form on the ceiling and peel some of the paint and apparently also get into the light fixture. The manager said the attic was getting too hot and they needed to put in some vents and exhaust fans and quoted me $3200. I reached out to the turnkey company who sent their own maintenence manager, and he said the inspector is particular about condensation issues and would have said something about needing more vents, so they don't think vents are the issue ( he said there were plenty on the roof). He suggested getting a dehumidifier and possibly putting more insulation in the attic.I'm at a loss for what to do now since I'm not out there. Does anyone have any experience with this kind of stuff?