It is a lot of work. My neighbor used to do it for a tire service and he had some pretty good sized tools to break the bead then persuade it over the rim edge. It can be done, but like Chris said, pay someone if you can. Good luck.
The pessimist sees a dark tunnel
the optimist sees light at the end of the tunnel
The realist sees the freight train approaching
The engineer sees 3 idiots on the track!