Marbella Tower apartment building offers to the residents impact windows, covered parking space, a fitness center, heated pool, laundry facilities, intercom at the lobby entrance, and community clubhouse.

I’m a power engineer who’s designed, and trouble shooted systems large enough for oilfield facilities.

I'm sure what they use is pretty standard, similar to what realtors use.

I have interests in flips & cash flow quads on the residential side, but more interest in the commercial side, ie storage facilities, laundromats, car washes and apartment complexes.From my studies, it seems pertinent to get an LLC running and to establish business credit.

In reading my 1993 fixed/adjustable mortgage note (5/1) I have the standard paragraph 11 "Uniform Secured Note" statement that can trigger a "due on sale" clause.

If you don't agree with their criteria, ask if you can raise the standards on your property.

If they come in as partners, they can deduct the interest expenses directly against their share of income from partnership.If they come in as lender, they can still deduct the interest as investment interest but might be limited depending on various other factors such as need to itemizing deductions rather than standard deduction. 

And if it does qualify as commercial according to building standards, can I refinance the building based on its commercial value?

When I was driving for UberEats, all of my pick-up points had facilities available. 

Does she meet your qualification standards?