It is a two unit , with the upper floor being a separate apartment that is part of the renovation.   

For this purpose, each interest you have in a rental real estate activity is a separate activity, unless you choose to treat all interests in rental real estate activities as one activity.

If it is a single meter and you have tiered electricity rates that electric bill would be significantly more expensive than for 3 families in 3 separately metered units.

I plan to open a separate checking account just for my SBA funds follow the rules and keep good records just in case..

That said- I’d love to hear the pros and cons of putting all properties into one LLC vs. each individual property being in its own separate LLC.Any insight would be greatly appreciated!

If all of these incomes are hitting your personal returns then that's one situation, and if they occur on separate returns that's a different one.  

.#6 - Look for lot size, living area size (above basement) GLA or Gross Living Area (add basement separately) Below Grade living area. #7 - How many total ROOMS, beds, baths, fireplace, pool, extras, remodeled (year) view, condition etc#8 - Garage, on-street parking, off-streetLook for 3 comparable sold properties and 3 comparable active for sale properties. 

I dipped a toe into real estate investing last year through one hard money lending deal and a separate house flip. 

You just keep the money in a separate account and pay interest on it for 30 years?

They all have separate electric but they share water.