OP- it’s your money and you get to spend it.
But review the terms of a HELOC or private loan VERY carefully. I know a lot of people who are retiring this year (or who had hoped to retire within the next few years) who suddenly realized that the “no brainer” use of their house to finance college is going to keep them working into their 70’s.
All those nice retirement worksheets you can download? Most assume no mortgage and just your property taxes, utilities, etc. for ongoing housing costs. That fat book you got from HR with your benefit pacakge 10 years ago? Same assumption. The online estimator you did last year which showed how “easy” it is to move from Pennsylvania to Florida? That assumes that you own your home free and clear and therefore, selling in a high priced state to live in a low priced state yields enough extra cash to finance your move and buy a car once you get there.
Using a HELOC is very tempting but unless you are really young to have college aged kids (and two more decades in the workplace) or have a rich uncle who is leaving you his fortune when he dies (he should live to a ripe old age of course) it really complicates retirement planning.