Due to the passive nature DSTs are not meant for every investor and it is important to seek education to see if a DST is best suitable for you. 

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.

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. 

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.

The good news is the bigger the loan, the more more open the banks to lend you a non recourse loan, that means you dont need a guarantor in the US, they will underwrite based only on the property cashflow.