The answer is its personal preference.

Of course most GPs have personally put in money to keep the deals from sinking.

So why is the $2,500mnth person paying $250 and the other one paying $350 ??????

Quote from @Hanna Brown: @Jay Hinrichs If the bidder at the auction pays cash for keys to get the homeowner out, does the person redeeming from the owner position (exercising rights of redemption w/in 180 days) have to reimburse them for those costs they paid to get the homeowner out? 

Additionally, ATCP 134.05 says that if the tenant provides a consumer credit report from an agency that compiles and maintains files on consumers on a nationwide basis and it is less than 30 days old, the landlord may still run a credit check but at its own expense.When I inquired with the company, they replied: "These laws are in place to ensure that you, as a landlord, are not profiting by incentivizing multiple applicants to apply when you have no intent to rent to them.

No data company is 100%.

I’d be curious to know what local company you found that would quote it, and if they used the CA Fair Plan in their quote. 

They might be willing to give different terms especially to a high net worth person that they can likely make money on cross selling.

I have personally used the BRRRR strategy over 40 tiems my self in Memphis.

As far as a flat rate, I would talk to companies offering services as mine and ask.