Second, the housing supply is still tight.  

Agreed on the lack of correlation between interest rates and house prices, but I do suspect rising interest rates will cause the demand curve to shift left, while the supply curve shifts right.

A "Supply-side" economics model, in a way.  

This is a team sport and you need connections to build you business.

Attaching an example that I think would work.Also, have you checked out the quartz counter slabs they sell at East Star building supply?

Private and hard money lenders can lend into whatever they want, but your need might be bigger than one of them can readily supply.

And even there, it will be limited by population, # of housing units, and supply/demand dynamics.If you find this all to be true, limit your AdWords account to only the "urban" areas there in IA.  

Winooski is what it is but it typically has some of the cheaper prices yet high rents due to its proximity to Burlington and the supply and demand the seems to lean toward demand in Chittenden county.  

Then I have one checking account per property, most of the rent gets transferred to each account which then pays the mortgage and any other expense for that property, the rest stays in the PM account which pays for common expenses such as supplies used on all properties.  

For multifamily properties, the economic growth is key factor - as people who are renting, would want to move to their own properties, so you need constant supply of new population moving into area (job growth)