Making extra principal payments

[George Bell]

Hello, 

I've been BRRRing and using 30 year DSCR loans. So I have been researching making an extra principal payment every year and how it will cut down your mortgage to between 21-23 years. I'm debating if this is worth it in the long run because If I do then I get them paid off earlier but at the same time I could be using that extra money to expand my portfolio and buy more houses . What's everyone thoughts on this ?

I currently have 7 houses and at a pace now of 3-4 more SFH per year