I've completely lost track of how many miles my Pig has on it. Still runs great! No failures of any kind. I did have to drain the tank once due to water in the fuel but other than that, it has been bulletproof. I have not had anything loosen up or need adjustment in months. I'm on my fourth set of brake pads, my 7th back tire, and my 3rd front tire. The HD#40 roller chain was the best $20 bucks I ever spent.
I also replaced the stock plugwire with one I got while at a local pull-a-part yard. I only needed one end so it was free. (Best kind of upgrade!)
If more is better, then too much is just enough.
If you can't afford it, build it yourself.