Try a safety net or free clinic, they might be able to get you the Rx without the scope, since they are most sensitive to cost issues. And they know no one wants to take prednisone if they don't have to, and it's cheap!
Also, you probably need to take a probiotic. That might even be enough, it seems to help some people a lot. But sorry, they can be pricey. A clinic might have samples.
49 year old female attorney, diagnosed UC/pancolitis 1985.
Asacol for 20+ years with Prednisone & Rowasa for flares (But nothing since Remicade).
Food sensitivity test by Naturopath showed wheat/gluten, other intolerances, helped some.
Remicade started April 2009 (Humira denied) and doing great~ learning what normal is~ wow