It seems that rentals are only worth it when you can do the domino effect to get a bunch of houses and be on the line for a bunch of debt.

I have a gas pool heater which doesn’t effect electric bill.

This is my first property and I am in on this with 2 partners who are effectively silent partners and I am running the rest. 

Builders often have an escalation clause built in that says something to the effect of “if material costs increase more than 10% during the time of construction, builder can raise the price to cover the difference”. 

Doesnt he provide his social when he opens up water account on his name which may effect his credit history or he's the type that dont care? 

Hoping to engage with someone quickly but many structural engineers haven't heard of this report.

How will this effect resale value?

Usually local lenders are the best to engage when financing unique acquisitions; such as a portfolio. 

Reach out to the real estate lawyer to find the most effective solution. 

A main question in this kind of situation is who brought the buyer.For example, if it could be shown that the buyer came to the seller because of the marketing efforts of the listing agent, that would likely have an effect on whether or not the listing agent was due all or part of a commission.In this case the buyer is the tenant and therefore wasn't brought to the transaction via the listing agent (unless the listing agent procured them as a tenant in the first place, in which case I don't know if that would count), and the listing agent apparently hasn't spent any money on the listing yet.