I took my first welding class last night, and I learned a lot in just the first class. We actually got to weld quite a bit last night (enough to give me a welder's tan on my arm). The instructor told us we could work on personal projects if we wanted to, so I am going to take my bike with me to class Thursday night. I'll post some pictures of the progress.
I'm not sure how much the welder I use would have charged me to put the motor mounts on, but the class only cost me $130, and they provide, steel, tools, welders, helmet, and all the safety gear. Plus the instructor will be looking over my shoulder to make sure I have the welder set up correctly and I'm not messing up too badly.