I agree with everything except the very last statement about paying cash to pay it off.

This is all true except the no expenses or depreciation part, you actually can do that in an IRA (just doesn't help you personally today) on leveraged real estate because that portion of the income is subject to UDFI/UBIT tax which is calculated after deducting the first $1000 and accounting for depreciation and expenses as it relates to the % of the mortgage. 

I knew a developer before the exception for being near mass transit planned to build 4 units but was only able to build 3 units.  

Except their customer service is only through email.

I use the exact same criteria for a voucher holder as a non-voucher holder except for income. 

With exception of the accountant, these individuals did not go to college with these careers in mind.She can use my properties to suppliment her income without a lot of work and, in my opinion, have a lot of fun doing it.

There are obviously exceptions to this depending on the loan product but take rocket mortgage for example.

Except the bank, they loose, because now your partners and you are getting what $ they would have sucked out of it. 

I charge a $500 deposit or a $25/m pet feeBut I have a condition...I tell the applicant that I usually do not take pets, but I do make exceptions.

To expedite the accumulation of reviews, focus on competitive market pricing, provide exceptional hospitality (aka.. go above and beyond to start... think welcome gift, etc), and encourage guests to leave feedback after their stay.