I saved myself a few hundred $ (Cam belt, water pump, idler and tensioner, cam/crank seals gaskets incl timing cover cost NZ$160 delivered on Ebay - 10 litres of oil and the two filters for the 4wd cost about $85 at Supercheap).
Downside is that some of this wasn't a lot of fun, my hands are cracked, ingrained black stuff, and a few fresh wounds. It'll heal / clean up.
I haven't paid a "mechanic's bill" since about 1990. Worst automotive mechanical disaster since then was when her indoor's cooked the engine on her (relatively new but out of warranty) car about 8 years ago. Not her fault - sometime stuff just happens. I bought an engine from a wrecker for $300 & gst, and bunged it in over the weekend. Despite some skepticism, by lunchtime Sunday, it fired up, and is still going strong 120,000km later, my son now drives it daily.
None of our cars are particularly "fashionable". I'm sure that some acquaintances of ours think that because I do this, then we're as poor as church mice. But I don't do it for that reason. I love/hate DIY. It's in my blood.