Time to replace a roof

[Nick R.]

Here's my dilemma, I need to replace a roof on one of my rentals and am debating on just paying a contractor to tear off the roof (it has a double layer of shingles) and cleaning up the mess, and then laying down the new shingles myself to save some $$$. I don't have much free time and figure it'd take longer to tear off the old roof than to shingle the new one... does that sound right? I've only helped family and friends here and there with roof work and this is my first time completely replacing a roof on one of my properties.

Thanks!