I'd pay $10k to figure out what exactly is wrong with my body. I've had constant injuries or issue with my shoulder, knee, and back for the past 5 years. Feels like I'm falling apart due to old age but I'm not even past 25 yet.
Maybe get tested for kissing bug disease (assuming you are American). It can significantly impact the joints and is seldom tested for.
If you have it, I take PayPal.;)