If you haven't done it already check out Czechman's link "currently working on this". It will give you a good idea of what is involved in the repairs you are looking at. The cheapest way out is to learn how to cut and weld metal and do it yourself. That is if you have somewhere to work on it. If your rocker panels are still holding the door frame in place you should be able to brace the cab and repair it. The rear cab corners and inner and outer cowl repair isn't rocket science and several members have detailed instructions on what you have to do. You tube has several good welding and auto body repair videos. I have managed to mangle mine together with a welder I purchased for under $300. It isn't pretty but most of what you will need to weld will not be seen once everything is back together. The body shop can dig deep into your wallet and drive you crazy. It is also nice to stand back at the end of the day and admire what you have done.

Neil
http://community.webshots.com/user/neilhatten