[JakeBlues]

OR

Create some business bank accounts.

Gang could get one, for a monthly or one time fee.

Special business interest, long term deposits option (like, deposit 100k for 6 months and get 200k in the end?) and so on.

A market where mortgages offered by gang funds could be offered within the game mechanics itself would also be nice. Pre-set weekly/monthly payment, interest rate, and pre-authorized payments directly in the buyer's account.