A good trick is to pay someone else $40/hour to replace the timing chain.
Places like this typically have lifts and other tools that come in handy.
I replaced my TC once, laying in the dirt, and sure enough, the thing leaked.
If you pay someone $40/hour when you get it back it won't leak. If it does you can bring it back and they'll fix it until it stops leaking.
Which path to take depends on what's practical for you. If they can name that tune for under $150, it might be worth it to have someone else do it. If it's going to cost $400, do it yourself. Make sure you have good jack stands, a floor jack, balancer puller & Installer (NOT A HAMMER AND BLOCK OF WOOD), torque wrench and a good place to work. If it still leaks after the repair - keep a extra bottle of oil in the trunk (shhhh... this is the madmike low tech approach to car fixin)