We use this strategy on our property in Hawaii. The key to it is understanding the fundamental difference between simple and compound interest. We were able to get a HELOC for 85% of the APPRAISED value of the home. This is drastically different than a HELOC based on a percentage of the equity in the home. Anyway, we took the HELOC and paid off the entire mortgage. Here is a quick rundown of numbers to help illustrate...
Appraised value= $725,000
Mortgage payment= $3200 monthly($1700 of each payment lost to interest)
HELOC= $600,000 @ 1.75% simple interest paid off the remaining mortgage balance of $533,000
New interest only payment= $770!
I charge my tenants $3650 monthly.
In real numbers all this equates to a savings of $364,000 in interest payments and the entire line paid off in 5-7 years. We take it a step further where we deposit our entire income into the HELOC. We’re roughly depositing $18,000 monthly. You can just imagine how quickly we’re attacking principle when our interest payment is only $770 and goes down with every payment. Another great feature is as we pay down the line we have access to it again.