Made some pocket change after fees Lessons learned?

Fixed Mortgage does come with closing costs and points upfront which the HELOC does not, except a $95 annual fee. 

Typically, once the project is done you can get it refinanced via the same bank saving a lot of fees compared to HML (Hard Money Lenders).

Look for areas with stronger rental demand, lower property taxes, and minimal HOA fees to keep expenses down.

In the case of investors, they still require a 20% down payment, additionally there is a 2.25% funding fee because the REO was purchased under a VA loan. 

Mostly MF and self storage.I bought an industrial property from a wholesaler, paid him a $600,000 fee. 

Home warranty programs charge a trip fee every time you file a claim, and they use that fee to compensate the vendor.

If you have a buyer's agent, you should have already signed a buyer's representation agreement and that fee/commission is disclosed in that document so you should very well know what that charge will be.If you were the seller and going to owner finance the property, what would you want to see from the buyer that tells you that they will be able to pay the mortgage moving forward. 

Quote from @Stepan Hedz: Selling fees (estimate), $30,000, and holding costs?

Costs include a conversion fee, potential property upgrades, and legal expenses.