Hard to be sure from just two pictures, but I think at least 2 and possibly 3 cylinders need replacing, plus probably all hoses. To me, from 2 lousy photos, it doesn't look like the structure got hot enough to distort or weaken, but certainly needs some paint. So repair parts are on the order of CDN$1000 from Princess Auto.
Asking price is $1800 on Kijiji, so getting close to $3,000 (around US$2,200 at today's exchange rates) IF you can do all the work yourself. Is it worth it? Well, that's up to you! How bad do you need a backhoe, how much time and effort can you put into the project, and how much is a working alternative?