Otherwise, bite the bullet and pay the real players in this area for what they provide (Buildium, Appfolio, RentManager, etc).

Blue, Green, Yellow, Orange, and Red are A, B, C, D, and F, respectively. 

Make sure you have plan A, B, C, D, and even then.... perhaps plan E too.

I hear a lot about standard personal loans, mortgages, etc - but do banks or smaller players consider situations like the above?

For illustration purposes, what are the benefits of acquiring 100 units if they are located in a C/D market with terrible fundamentals and no reasonable expectation they will appreciate?

@Blake Yarbrough why not have the individual loan you the down payment, secured by the property, at a rate that is more than he can make in the market or in a CD and calculate that amount into the total debt service.  

I can at minimum, provide insight into certain markets/ball players to connect with based on your strategy. 

Vacasa and Evolve are two of the major players that could have an opportunity in that area for you to be boots on the ground.

Buying a Multifamily or home in a C, D, area should come with a lot of equity as it is the only reason to get into any deal for these areas as you don't want to spend more than upfront out-of-pocket cost.Look up Cap rate, Cap Expense, Insurance Expense, Vacancy Expense, Tax Expense (which should include a licensed pro at some point), Real Expenses in relation to owning Multifamily real estate, and other things you don't what to be surprised about before doing your first deal. 

@Scott Trench Had a deal close last month with a combination of your scenarios/players.