My state doesn't have income tax, but verify how installment sales are treated in yours. 

You will have to buy it out right or be buying.it under an installment contract.

15.3% Self-employment taxes is a lot.Scenario 1 - You do a cost segregation study in year 1 and create a huge loss to offset your other income, great for year 1.Horrible for years after 1 as you used up a majority of your depreciation and now your net income will be subject to 15.3%.If your depreciation is mostly used up and don't plan to have net income, your business is not profitable.Scenario 2 - No cost segregation study is done and your depreciation is calculated over 39 years(low depreciation rate, you will likely be paying some sort of net income subject to 15.3%.Maybe not in year 1 if you have a lot of furnishings installed.

My main goal is to identify an opportunity that can be scaled from a couple of spots to a dozen, to several dozen eventually without the need to completely re-design or re-engineer the layout without respect to providing utilities. 

I just looked at the 2nd installment and the jump in wild!

If a certified electrician told me that a GFCI outlet in the bathroom was installed correctly, and I had initially said it wasn’t, then I would immediately know that I need to update my education on that system and would hope that other inspectors feel the same.

.- Tax Benefits of receiving installments instead of a lump sum payment.- Legal Options for the seller if the buyer does not make payments.- Visual/Explanation of how the loan looks on the HUD-1 at closing.Good Luck!

Who are all the ICF Builders or Installers in San Deigo area

They have their own device you need to purchase and install.

The reason I ask is, I'm going to install updated fans in my primary residence which one day, will be a rental property.