Pay off HELOC or stock pile cash

[Jeff Lease]

I am closing on my first deal this Friday and a second deal in another month. Both are single family residential homes that do not have tenants in place. I am putting 20% down on each from equity on personal home. Should I pay off the HELOC as fast as possible or stock pile cash? I don't like debt, but I also don't want to pay the HELOC off. I want my tenants to pay off the HELOC. Any advice?