The math is fairly easy given your assumptions.

Please note that we will be flying out to the area fairly soon.

If they are VERY professional, they will have their processes in writing as verification that policies are enforced equally and fairly by their entire staff.6.

that sits right on the parade routes, a block from the college campus, and block from a bunch of restaurants and bars. 

This circles back to having a lease, increasing rent fairly, and saving every dime of cash-flow.

I am fairly new to real estate, but have been able to get a few properties which will help us own a block in downtown Columbus, OH.

I have people ready to give the funds, I just don’t know what’s the best set up that makes it fair and attractive for both parties.

I also keep a fair amount if cash (10%).

Your assessment is fair for sure.   

He's changing the terms of the agreement, and you can choose to accept it or reject it.I don't think it's fair to pass this cost onto the tenant just because you are unwilling to stand up to the contractor.