I'm not sure what leverage you would have outside of taking legal action, these are generally things that should all have been on the closing statment along with deposits etc. 

The greatest and probably only leverage I have as an out of state investor is the proof of funds to show I have the liquidity and the risk tolerance to average 2-3 deals per month.The Yelp thing is specific to California and only for companies.

Any syndicate that over-leveraged and/or has a near-term maturity will be very challenged to survive. 

If you're looking to scale it could be worth while to sell and re-distribute that equity with the help of some save leverage. 

But if I put the money into buying a house, with the leverage of a mortgage loan, I can still earn about 11% annually on my investment on the appreciation, even though there is no cash received for the rent.

In addition, you’ll be included in their newsletters for additional real estate investing resources.The best way to leverage RentRedi benefits is for rent collection:Tenant applications and screeningDocument and field maintenance requestsE-sign leases Tenant communicationRenter’s insuranceAnd for Stessa benefits: Property bookkeeping and accountingPortfolio monitoringProperty analytics to track historical performanceSchedule of Real Estate OwnedLandlord bankingTax prep support 

$500k would be enough to go out and buy something else leveraged that would potentially get you a better return.

Furthermore you can vastly increase your returns through leverage using a non-recourse loan but that will definitely trigger UBIT but again the numbers can still make a lot of sense. 

You're still leveraging his network/connections/professional experience.

The problem is: A traditionally financed low-down payment house-hack with traditional long-term rents simply won't cash flow during occupancy, or after, in many MCOL-HCOL markets in the US. 95% leverage at even 5.7% just won't work in a lot of cases right now.