I do not know the details of your market- however, in certain markets 3-4 unit buildings will be easier to find better numbers on as sometimes the smaller ones (2-flats) are priced out of certain markets due to regular primary residence buyers buying them up too, due to low inventory. 

(You should be regularly attending networking events and the like.)But to be honest, generally it's hard to get private lenders onboard (other than close friends or family) early on in your investing career.

This will also help you monitor how many shows you have and if PM is checking on the property on regular bases.

Do you regularly flip?

When you are done with the 10 conventional mortgages…even at number 6 it gets onerous to keep enough reserves and to jump through the hoops for regular mortgages.  

Like a Keurig PLUS a regular Mr Coffee....at one place we have a French Press and a pour over as well.

@Basit Siddiqi More difficult than regular books for accounting? 

Should I continue to reach out regularly in different ways (email, phone, knock on their door, etc.), leave them alone, refer to someone else or other? 

So the lender can use $1,500 of House 1's income to offset the $1,900 House 1 payment meaning your regular income needs to be able to cover the payment on that $1900-1500=$400/mo plus the cost of the new mortgage for house 2 AND since you mentioned you owned a duplex, you need to calculate the same income and expense calculations we did above to figure out how much you qualify for in terms of a mortgage.

And the returns are still excellent.2) In the right markets, short term rents allow you to earn far greater profits than regular long term rentals. 3) You can find ways to get discounts even in areas that are great returns.