This is a cash business.  

Also, how do you utilize auction.com or similar to wholesale if most properties say “cash only” and “100% due” when bid is won?

I'm looking mostly for if I buy a 4-unit quadplex (example, or Triplex), how to calculate NOI, Monthly Cash Flow, Rehab, Cap Rate, Cash-on-Cash, etc.For example, whenever I find a property on Crexi, Loopnet, MLS, etc. the NOI sounds good but when you factor in mortgage to get the cash flow, it's almost always negative.I also don't know how to properly calculate a rehab to see ARV so that may be the other issue.

Hi Albert,Positive cash flow house hacks are very difficult to find in CA.

Purchase price: $380,000 Cash invested: $25,000 Sale price: $385,000 Single Family What made you interested in investing in this type of deal?

Purchase price: $250,000 Cash invested: $75,000 Sale price: $425,000 4 Bedrooms1 Bath What made you interested in investing in this type of deal?

Purchase price: $350,000 Cash invested: $20,000 Sale price: $385,000 Single Family - Off Market DealFall River MA What made you interested in investing in this type of deal?

FYI my goal is to always increase cash flow.

So I turned up at the county courthouse this morning with cashier's check and extra cash in hand to go up to $5k over asking. 

I'm not sure you should feel confident about the return on your equity if there is no cash-flow.