I did this several years ago.
A couple of considerations based on what I found.
1. It's not a real estate secured loan, but a personal loan. In other words you cannot deduct the interest at year end as you can with a real estate loan.
2. The interest rate was HIGH!
Now for me it worked since I knew it was a short term bridge that allowed me to buy the contract I wanted without messing up some investments and I paid it off fairly quickly when the investment was sold However, I would not recommend it due to the cost for a long term payment plan!