That being said, most originators are hit with a clawback penalty if you payoff your loan within 6-9 months, meaning that the originator has to repay all commissions and fees to the buyer of the loan if you payoff the loan within that period.

If its a conventional conforming loan then I believe they should be reporting your payments.

It depends on how long it takes you to complete the rehab and what type of loan you take for the refinance.

minimizing free cash flow with larger mortgages or shorter term mortgages takes the cash flow which would be taxed and puts it into the amortization of the loan. 

My bookkeeping practice pays me active income, so my priority is equity.For debt loans, you will see 10-15% annualized, depending on your experience as an operator.

Quote from @Gary Bonds: Any best practices when attempting to secure business funding from a bank, in the form of a loan or credit?

If you pay cash you'll pay yourself back percentage back, if you use the a hard money loan the refi would pay that off and the difference would go to you

The loan programs of your buyers will dictate how much of a credit you are allowed to apply to their closing but it certainly helps to move inventory when you offer an incentive. 

Also depends if you are getting appraisal and what attorney charges for creating loan docs

Quote from @Zachary Deal: One thing to keep in mind if you are doing this is that you are likely to create "functional obsolescence" which could mean you are not able to get a new loan against your property and it can be difficult to resell as well.