Seller Financing / Sub-To: Take over payments or negotiate terms with sellers to minimize upfront costs.  

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.

Is it for a shorter length term than the normal 30 yr?

I agree with @Jonathan Greene that the question is vague, so my advice will have to be as well.The short answer: MTRs are real estate, so just like all real estate, any place that can long-term-rent cash flow with increasing jobs/population can be a suitable site to purchase. 

For me and my goals, I focus on long-term investing in residential single-family homes in Florida and Georgia.

As Columbus cements its reputation as a tech hub, the ongoing and planned investments by major tech firms are likely to ensure long-term growth in the local real estate market.

Texas is a great option, consider San Antonio or Houston for strong cash flow, DFW or Austin suburbs for appreciation, or Corpus Christi for short-term rental potential.

Real estate is an excellent avenue to help you achieve those goals, especially since it can create both passive income and long-term wealth.

IF you have super strong income and you and have a lower 1st lien, lots of equity - MAYBE your best bet is using a local bank or CU to get most competitive HELOC inv terms.

The key will be to set up terms so your monthly payment works.