In that situation the investor usually still wants the yield to be high and willing to take on more headache type assets like SFR, multifamily for higher cash flow.In another example if a doctor is worth 7 million and makes 1 million a year doing surgery they typically have no time for anything but to see patients so getting a 7 to 8% return sounds great to them and be passive and just collect a check. 

If you literally just closed two weeks ago, then your first monthly mortgage statement hasn't even arrived yet, the CD has all the pertinent information on it that would also be on that statement.In general, recall that you don't have to give anyone anything that you don't want to, and they don't have to give you the HELOC, so that's kind of the dynamic at play (excluding "protected class" things like a doctor's note attesting to your continued good health, or your religious affiliation).

We have a lot of doctors and high executives that invest.

The tenants’ income also likely increased by a similar amount, and even if not, where are the articles chastising the electric company, grocery store, barber shop, mechanic, plumber, and doctor for all raising their prices 3% per year as well?

This is niche territory, like reverse mortgages, or spinal surgery (you wouldn't ask a general family doctor for spinal surgery would you?)."

That's why many business have non-refundable deposit and cancellation fees.....hotels, airlines, doctors offices etc...... if you bail on me and I could have had another paying customer using my services at that time, then I'm not eating that lost revenue.... that's on you.If I got lucky enough to rent it out real quick I may refund the $$ just to avoid the hassle of dealing with them if they put up a fight.... otherwise they are on the hook for the booked time

However, in the real world your life will have it's ups and downs so maybe for 5 years during your 30's you don't contribute at all because of marriage, kids, medical expenses, and so on.

And a doctor occupies unit 200, 201, and 202. 

This is especially popular with doctors, lawyers, etc who run their business out of part and lease the rest to maybe a CPA or tax prep shop.

I am a partner in a medical group where a single owner owns the building.