I'm buying index funds that I'll hold for the long-term.

That is why holding longterm is important. 

Good luck with whatever you decide😊 This is repeatable post/answer that I really like.

It is definitely possible to get a fix & flip/hold purchase loan on something like this but on a conversion such as this one you will definitely need a contractor or some subs for the experience factor and all-star credit so lender can feel confident that the project can be completed.

The only way you can get anywhere on this is to have an early discussion with the seller of whether they would consider holding the note, but you'll need to figure out what appeals to them to get them to do it.

I currently own 15 rentals with no debt and plan to hold paper.  

I am now trying todo a cash out refinance to pay off my HELOC so I can repeat the process.

The property management company receives income from your real estate holding company. 

Their long-term buy and hold has put their net worth into middle 7 figures and just with a small number of properties.

They rinse and repeat until the money, deals, or REI motivation runs out.