You'd need to find out if the co-op would allow a non-traditional bank to finance the purchase. 

I borrowed against my car and 401k to come up with the down payment and used a traditional mortgage with 20% down..

The traditional way of doing this, and the easier way IMO, would be to talk to potential private lenders ahead of time. 

I'm familiar with the traditional methods, so instead looking for advice from real-world experience.

in addition to whats been mentioned above, i would go one step further and talk with 2-3 traditional banks before buying the property to see what their requirements are for a "cash out refi". 

Your RevPar should be greater than your traditional leases.

Besides picking the winning lottery numbers, shorting all the stocks and just happening across this legendary idea of electric cars and going to mars.. what would you differently in your early 20s finically, business, and personal development?

We have made plenty in San Diego with just traditional buy n hold and fairly minor value adds.  

I just bought a house (in California) under my name using traditional bank loan (so no LLC or Corp).

Traditionally, a borrower can get an approval for an FHA loan with a FICO as low as 580.