I’m in the PAYE repayment program where your payment is based on your income.

Higher cash flow usually comes from properties that require more "hands-on" management due to the condition, location, and tenant base.

Before choosing a turnkey service/company, I'd use the search feature here to find past posts like this one where members share their experiences.I am a big fan of creating and following standard operating procedures in my business.

Based on my calculations it seems a bit overpriced.

Too many facts and each company will be different based on size of project, single family or multi family, single property or multiple properties, etc.

If it is simply the house and the tenant pays all the utilities, I personally would not charge more because you are renting them the house-not based on how many people are living there. 

Ceiling white matte, walls Navajo White eggshell, trim base white semi gloss. 

Ft Myers Beach regulates the minimum stay to daily, weekly, and monthly based in the street the property is on.

Where are based out of?

You could have a case based on misrepresentation if the seller, acting as an agent, falsely claimed the roof leak was fixed.