Here are a few things to consider. Most banks aren't doing HELOCs these days so you have to work a little harder to find one that is. Either go through a trusted lender who can do the homework for you or search out smaller, local banks. Interest rates on HELOCs are usually going to be higher and they're typically loaning only 70% LTV, 80% if you're really lucky. Make sure you account for appraisal and closing costs on your HELOC. You'll want to compare that to doing a regular mortgage on your second home. Your interest rate is going to be a bit higher on a non-owner occupied property. However, you'll at least split closing costs with the seller, or negotiate the seller to pay for all of the closing costs in which you save quite a bit. In this uncertain economy, I think I'd keep my primary paid off so you always have a place to call home if it really goes south. And, if you're not trying to grow a real estate empire, you probably don't need to leverage your primary residence. Let the risk sit with the 2nd home and hopefully you get a good enough deal that the family members can cover the mortgage and expenses on it while you sit back and wait for it to appreciate and simultaneously reap the benefits of loan pay down. Just my 2 cents.