I've got a compression tester and what's wrong with your engine?
I only really started playing around with cars in the last few years and admittedly have a couple of mates that help me out but just get in and have a crack.
I've found most mechanics these days are by the whole lazy, full of shit, and you pay for the privledge of them doing a half arse job and lying to you.
Not to say that there isn't some gems around, just had a LOT of bad experiences so I picked up tools.
Want something done right, you better do it yourself :D