If a nearby hotel is charging $650 per night for a 1000 square foot suite and keeping it occupied, would I not be able to charge the same for a 1921 mansion that sleeps 10 people comfortably?

Unlike those items, while you can charge for more rent, you can't have another separate tenant live there.

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

It may or may not show on a credit report, depends on the servicing and you should have the loan serviced.Failure to include the debt on a future loan application is mortgage fraud, wanna go to jail?

What fees to charge and returns to target? 

Charges for marketing pics, 3-D Tours, Floor plans?

As long as you file it, you have protection from the charge of fraud.Tip: if you file Form 8082 to protect yourself, send your tax return in by mail.  

But be wary, there are expensive accountants out there that try to overly charge clients due to their knowledge.

Sometimes when examining the entire capital stack, its determined the higher finance charges paired with higher leverage is a winning proposition but only experienced real estate investors should be making that call. 

One area can show great signs but literally cross the railroad tracks and it’s a different world.Be aware of these types of physical delineation.If you are getting no demand from qualified applicants then I would say it’s not in a margin of a gentrifying neighborhood.