. $30k in reserves seems a bit high since you already have $650k in reserves.

I will probably be like many old school types who start selling off in their portfolio in their 60s and 70s, so they can enjoy and cash in on that built up equity. 

$400 to heat four units in New York in the middle of winter seems pretty reasonable.

Sounds like you already have your mind made up or at least you’re slanted in a certain direction.

Sounds so appealing but it can all be done without any Guru!!!

Have you ever stopped to think about how much wealth you’ve built up just from being a homeowner?

Of course "hoping" rates will come down is not a sound strategy so finding a way to assume a loan that already took advantage of low rates is a great option.If you were starting over and targeted a large SFH, would you try to maintain the property in a way that would still attract regular homebuyers (not investors) if you needed to sell?

In 2008 a friend of mine spend $300,000 to buy 100 houses in Detroit.  

Thanks in advance.  

It sounds like you are off to a great start for 2025 and have a good plan.Finding good deals is often the most difficult part of the process.