I self-manage and it's my main source of income.

Hi Richie,For the most accurate information, it's best to search directly at the source.

A good real estate brokerage firm will not entertain or interview you if you do not have an active real estate license because those brokerages are top producing brokerage meaning those companies are buying leads with premium leads like Zillow and other sources.

As a lender using cards is fine just make sure you have the funds seasoned (2+ billing cycles) in your account prior to engaging into a loan transaction because funds sourced from an unsecured source cannot be used as down payment or closing costs.

Source: Mortgage Rates: 30-Year Fixed Rate Mortgage Average in the United States (MORTGAGE30US) | FRED | St.

You can't deny based on non paycheck income source. 

However, this difference in rents doesn't factor in that two-story homes on average tend to be larger than one-story homes.My data source isn't super precise showing rent-to-sqft ratios, only rounding to whole dollars.

But many of those companies (Corelogic, Black Knight) get their data from error-prone sources as well.Data in the real estate world is poorly digitalized and structured, despite the best efforts of programs like RESO. 

@Sean HaranRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder, etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

There was a guy here who described this as his number one lead source for investor money on multiple podcasts.