How much more efficient is the new boiler versus the old ...15%, 40%... more?  

So my ultimate question is:  how can I structure this wholesale deal/contract to get it to a closing to ensure that the end buyer that they will actually receive the property upon closing?   

When I replaced mine - I went with exact same brand and tank size but a high efficiency model - measured to make sure same height - Handyman was installing - of course it didn't fit through the door where the old water heater was.High efficiency one had more insulation and about 3 inches wider.  

I lived in Atlanta our winter are some what similar. have you consider on making your property  energy efficient not zero energy efficient but small percentage, Wrapping the boiler may help ,also suggest to your future tenants to get on  a flat rate with their utility company, Yeah they may pay more during the off peak seasons but at list they'll be able to budget, and you'll be able to market your rental unit as being energy efficient.

There was a lot to learn here, mostly about human relations, and there was a lot of interesting and diverse insight by the posters.You sound like a motivated, efficient business professional used to travelling in a circle of like minded people and as you said, you have expectations that the folks you deal with will carry a similar attitude. 

That is one of the principle reasons on my raises that I require higher minimums, and I take the time to ensure in my mind that my investor is suited for the investment.  

Also, I'm all for efficiency and effectiveness, but unfortunately, this may cost someone's job, perhaps in a smaller Parish.

I think i am getting more efficient at figuring out what I am bad it.  

I think this will only be a short-term negative affect as some residents of southwest Houston head to the hills.That said, Houston still has a very efficient Real Estate Market operating on a approximate 15% ratio.

They say the best thing for an investor is to have contact with someone who knows what they're talking about in the field and to get free estimates on that type of work to ensure that they know what they're getting into before they stick their neck out.