Engine help!!!!

Ok so about a month ago my truck broke down and dumped all the coolant out. It ended up being the water pump. So i had it replaced. Then about 1 week later it started leaking again. So i had it looked at somewhere else. It ended up being the water pump gasket this time. So i had that replaced again. And now it is leaking again so i had it checked out at a 3rd shop. They said they checked the engine over and the head gasket is leaking, the intake manifold gasket is leaking and the water pump gasket is leaking again. The machanic said it looks like the leaky head gasket put too much pressure on everything else and that is whats causing everything else to leak and blow. I have a 95 sonoma, 4.3l v6. So today i was looking through my Hanes manual and there is a ton of shit involved in it. So if i have the do the intake manifold, heads and water pump again, is it easy enough or should i just pay someone to do it? And if i just pay someone to do it what is a decent price? Thanks for any help guys.

If it's something you've never done before, and you don't have all the correct tools, you'll be better off having someone else do it. If one of your head gaskets are blown, stop driving it now. More than likely you are dropping coolant into the cylinders..