For the past 7 yrs I have been on mtx, initially orally 25 mg a week, but last 5 yrs self injected mtx, 12.5 mg once a week and doing well.
Budesonide does not have the
side effects one gets with say prednisone, but I found it didn't work at all for me, probably because I also have Crohn's in the large colon as well as the small intestine.
It is worth a try for you - it does work for some people who only have Crohn's in the small intestine.