Do you think its smart to have seperate bank accounts for your properties?

The buyer if my duplex had asked torepair the overhang on the roof, and fix the outside staircase so the bank would approve his loan.  

Not banking on appreciation.

Most banks take 30-45 days to close while my private money lender takes 14, a seller will always pick me over the financed buyers.

Depending upon the bank they might make you take care of code violations /ongoing litigations etc.3.

It's less than the 20% the bank wants.

Is it better to have your checking account for your LLC at the same bank as your personal checking account or is it safer (as in if there is ever a lawsuit) to have it at a bank that is completely different?

Are there banks that create lines of credits across all my investment properties?

The buyer can send their payment directly to the seller within a few minutes, without waiting days (and paying significant fees) for a bank/escrow company to issue a wire transfer. 

, most of it is acquired through poker and i do make 5k per month (on avg because you can have like a 10k month but then next month be down like -1k like trading etc.) but it's not considered a real job i have the bank statements to prove to a lender but other then that i'm not sure what direction i should go any advice and posts are appreciated thanks!