I understand that if I rent this ADU out, then I can have a tax write off on the mortgage payment and insurance payment for the the ADU's sqft portion.

That allows the payment to be low, manageable and easy to cash flow when you transition it into a rental.When you move out you will have more money in the bank, stronger assets, and be cash fluid in case you need to make an offer on more investment properties.

Then you can talk to the mortgage company or payment processor yourself. 

Before you ask, No, they will not make any back payments.

If you were to refinance property one and pull out another 100k (lets assume a 500k house in tampa that you need 100k for a down payment), you'd be paying 6.5% or so on that 100k. 

Overall sale prices of homes are lower than most areas so that 100-200K can be multiple down payment on investment properties.

With margin trading of 20-25% of initial investment, when stocks market collapses with dollar cost averaging as a strategy  , leverage of the initial investment in stocks, the AAR can be more.comparable to most syndication (compared to 20% down payment in real estate).I have been following BP forums for the last 4-5 months and have spent almost 4-500 hours.

If rates drop in the future, refinancing again could lower your payment, but it’s good to make sure the numbers work now just in case.

Very pretty small house with a great mortgage payment Lessons learned?

To scale, I plan to build a reliable local team, leverage 25% down payments, and use strategies like HELOCs or cash-out refinancing for future acquisitions.Good luck!