I'd buy a bigger and more powerful anti-clogging toilet and install a better ventilation system. lol
No, seriously. I'd put out a reward for anyone who finds a cure for uc, of course the results will have to be verified by other doctors, GI's, etc. that inflammation is actually gone, etc.
Then I'd pay off the mortage, my parent's mortgage and my mother-in-law's mortage and I'd open a community center, equipped with an indoor swimming pool, basketball court, gymnasium and music and arts departments. Hopefully, there will also be programs there to teach trade skills as well.