Is “no partners” realistic?

[Mark Costa]

I’m interested in owning apartment building(s) for cash flow but not in working with investors. 

I’d like to own my own buildings and not have other stake holders who are owners.

Anyone take this approach? 

How much does this limit my ability to grow past one building? 

(Assuming all of your initial investable funds go into purchasing your first building and you don’t want to use private OPM to go past that.)

[Jeff T.]

Sure, people do own their own apartments. You just need enough for downpayments and expenses.
David Shumacher built up a portfolio of several beachfront apartments and 30 condos without partners. He did it over time. See his book Buy and Hold Forever.