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.

There is a lot to be said for the nuts and bolts of what you offer but, remember, a home is usually an emotional experience.

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.

We have a 10x10 backyard, and were thinking leave about 3-4 ft in the back for just putting HVAC system and such.

You should set up a systematic marketing system to your sphere of influence.  

Compliance with this new rule requires major systems and operational changes.

I need to find a system that helps me organize all the work from beginning to end ...I have a lot of information in my head and I do not know where to start... 

@Dana WhickerThat markup that a GC provides has a lot to do with meeting and managing the subs, its not like we make 30% off their services.