but being mortgage free isnt better financially as the end of your post just said. it only gives you mental freedom. caring a mortgage is a lot larger step towards financial freedom.
Why is carrying a mortgage more of a step towards financial freedom ?
Assuming you're going to own a house either way and removing the renting option from the equation.
At today's low fixed rates there has never been a period in the us stock market history where carrying a 30 year mortgage to term was more financially efficient than paying it down. The market avgs over 7% real returns on 30 year time horizons.
Basically if you have a 200k mortgage at 3.5% and you choose to take 200k and pay that down vs where I choose to invest that 200k assuming historical stock market returns at the end of the 30 year term I have 1.5MM you investing the mortgage payment over 30 years have 1MM at the end of 30 years.
It's also safer to fire with one bc its an inflation hedge since its a fixed payment and price from the past that effectively gets cheaper every year. If you retire on a 4% swr and 1MM in the bank with a paid off 200k house cfiresim gives you a 92% chance of success. If I retire on the same 4% swr on 1.2MM in the bank and a 200k mortgage I have a 94% chance of success. Why bc that extra 200k while at the begining I'm taking out closer to the 4% swr on it gradually decreases with inflation over time.
There are monster threads on this topic and having a mortgage even as a real estate investor is more optimal than not. at today's rates. (a good real estate investor lives in the land of leverage its where all the profit is)
and all of the above doesnt even consider the fact that some are paying down their mortgage before maxing out tax advantaged accounts increasing time to FIRE even more.
above you asked what the 4% rule is. you should probably go read up on what it is b/c its a fundamental component to many around here. Coming in to a site with an open mind financially will help you greatly. i used to be on that side but when the math is presented its quite black and white. some here like to say they have a financial reason for doing it but those are few and far between its mostly emotional