I have a BA in Computer Science from The University of Texas and have worked as a software engineer, project leader, technical manager and systems analyst since the early 1980’s.

It takes KNOWLEDGE, money, marketing, negotiating, and system structure.  

He designs heating & cooling systems for mostly commercial buildings.

If a company knows that you are a real estate company (using your NAICS or SIC code), they will shy away from that.There is someone named Jorge Bueno that has a system called "The Business Codex." 

Building looks to be in OK shape, but there's no capacity to expand the septic system beyond the one bathroom, we're told.

Mark,If you are used to and have the infrastructure (people and systems) and the guts to handle C-D properties, then by all means get the deal as this sounds like an awesome opportunity.I was able to get 2 buildings - a 36-unit and a 24-unit with no money down - exactly taking over the mortgage payments of the seller.

Marcia also gave you some good advice if you're convinced on using floating system.

We are in the process of systemizing so that we can increase volume and do more deals.

I just installed a new central AC system at a rental unit.The install cost me over $3500, and Florida Power and Light offers a pitiful $91 rebate.I heard in some other states the power companies offer a significant rebates to a new AC or furnace, or even energy saving appliances.Anyway in order to get this $91 rebate my AC installer asked me to provide to him the FPL account number of my tenant living there.When I asked the tenant about the account number they questioned whether that rebate should be going to them or me.I paid for the central AC system.Yet FPL is offering a rebate and requested an account number for the rebate, giving them an impression this is the account which should be reaping the benefits.What say you? 

Electricity shouldn't be a problem but it may not be realistic to separate the heating systems.