The biggest factor or problem that I see is that sometimes people don't set their sights high enough, they get lost in the details worrying more about $$$ versus %, or they shoot for an industry versus the product. 

They only sell Huebsch products. $575 for the dryers and $950 for the washers.

(I don't get a sense that he is physically dangerous, but I could be wrong.)  

The 10 year maturity date is where the HELOC will modify into a different product all together.

You can find them all over social media (flippers love showing off their products!)

You are on the right track though knowing that you need to bring something to the table, but it wouldn't be a lead product because most of them are the same.

--all you have is anecdotal evidence while you're in the midst of it.Unlike 2008, the current market really is a product of supply and demand. 

Investment property HELOCs are a bit tough right now, a lot of banks did tighten that product during covid and they are just now coming back.

Part of my role is helping new investors/owners understand our product and decide if we are a good fit for their property management needs.

The BiggerPockets bookstore has some great products.