On the other hand with performing notes do you make your money on spread interest?

Assuming a 6 month, 100% loan for the purchase price at 11% per year plus 2 points, as well as 15% interest for the full rehab, here is an estimated P&L:Don't mislead yourself by focusing on the spread between the purchase price and ARV, as many new to the business seem to do, ignoring all expenses.

If you are having a hard time finding a buyer yourself, you can either sell the contract to one of those wholesalers (if you have a good enough spread) or share the fee with that wholesaler if they bring a buyer that closes.

Since you are not as concerned about spread for a fix and flip you really just need to focus that your market is either stable or in an upswing, obviously the latter is better. 

I keep the receipts and tally them up at year end.I gave my accountant a spread sheet adhere 1040 self employment.

If you (or either of them) were knowledgeable enough to navigate the entire transaction, you could tie both ends without an agent, saving at least 6%, which would have been plenty of spread for you to make a nice fee.  

This is one of the few reasons why some people choose to invest in multi-family; to spread the risk. 

But the first ones took a bit longer and more spread out as we were fine tuning our system to be able to handle the pace we are at now.

My concern with wholesaling as an agent, i dont know about Nebraska, but in Wisconsin, it could be construed as a "net listing" an illegal activity even though an agent is not listing the property, but selling their contract, given that its potentially a significant spread, the state could see it that way.  

Its on a .gov website so its a federal calculator to determine your rate spread limits, but remember, it only applies to people buying their primary residence. https://www.ffiec.gov/ratespread/newcalc.aspx