But I can ask to see how the interest rate is affected if I had to pay the PMI.

The income from C would more than pay the mortgage on D because C would be paid off by then.)Then it would be repeating this, just develop a beach house after beach house, and put them all on AirBNB/VRBO. 

Does this affect your plan for flipping?

Then if he likes it, boom: you now have a real estate mentor and you just rinse and repeat moving forward.Many investors are happy to help, but lack the time.

I also want you know your opinion about how they are affecting investors now that they are buying houses or your opinion on how they are affecting Realtors.

Of course, then owners counter that the PMC should have picked a better tenant - but that isn't necessarily fair as "life happens" to the best of tenants and PMC's have no ownership in the property.Both parties are affected, so in our opinion there should be a split.But, it's whatever you negotiate.

It occurred to me that having outstanding loans on multiple rental properties may negatively affect our debt to income ratio and our ability to qualify for another primary residence loan should we decide to buy another primary home in the near future. 

You should be able to pull out the down payment so you can rinse and repeat the process. 

Keep track of rates as you go, as these will affect your buyers and final pricing.

This step might affect your offer.