The modeling of this is actually pretty easy (see link: 42-unit proforma sample), but my model treats the pre-refi loan as I/O, but that can be updated based on your deal.

you will not find a cashflowing property at 100% financing whether its with a traditional loan and heloc or whatever the terms. 

I didn't see a need for a holding company but if someone wants one, you can just use another LLC as the holding company.

The reason why I ask is because that could determine what loan options are available to you (and interest rates). 

I definitely would pay attention to key macroeconomic stats such as population growth, job growth, and where companies are moving/developing.

So I did a 3-2-1 buydown and secured a 2.875% interest loan for the first year of the loan, and it will gradually go up a percent each year until it hits my rate of 5.875%!

Quote from @Brian Burke: @Chris Seveney when I started my lending company with two partners our aim was to go from $0 to $2.5M per month. 

Typically corporate/bank owned homes are managed by an asset management company.

If it is someone you know you can give them a straight return as if its a loan - can provide a lower interest rate to provide upside - it really depends on the lender and what are they concerned with and what is their risk profile. 

Is it hard money loans, angel investors, etc?