"Alternatively I could go learn the typical way and deal with HML, build a network. And learn how to stomach the fees. Does the HML route gets easier when you do it a couple times? We do intend to scale out and do more in the future. Is this the best route?"
Hey Zhijie, from the perspective of a HML, yes, the HML route can get easier when you do it a couple of times. I believe it can get easier because it sounds like you are most concerned about the fee among any other factors, and, it is possible to lower the fees you pay. After working with other full-time investors, I have noticed that they either negotiate lower rates after having a history of business with a lender or they borrow a lower amount of funds so they retain more equity in the deal and the 2-2.5% fee is not as expensive as the amount charged for maximum leverage. On this note, lenders are more inclined to offer better rates/points for a low-risk investment, the lowest rate and fee I've seen is 9.5% and 1.5% for origination for experienced investors on good investments. I usually navigate this topic by asking the client what is important to them. For instance, it could be the lowest rates, maximum leverage, or closing times, etc.
Typically, the origination fee will be the most expensive cost on a project, but it is smart to keep in mind any doc fees, costs of appraisals, and costs for inspections.
I hope this helps provoke some thought for your up-and-coming project. Good luck with your investments!