Do you have insurance at all? If not, you'd probably qualify for the patient assistant programs from the drug companies.
I know that Lialda and Apriso (both mesalamine like Asacol, just delayed-release) both have cards available to ANYONE that will refund you money if you have to pay over a certain amount for your prescription each month. I forget how much it is, but I'm pretty sure it's something like $25. I know Apriso has info on their website, but I can't remember if Lialda does or not. If you can't find it, let me know and I'll look at the card I got when I went to a CCFA seminar a while back.
Unfortunately, if you can't take sulfazalazine, I think that Asacol is the next cheapest. My insurance just changed, but before that, Asacol was a tier 2 drug (generics are tier 1, $10 copay), with a $20 copay, while Lialda and Apriso were both tier 3 ($45 copay). Now, we just have a two tier system, where generics are tier 1 ($10 copay) and all other drugs are tier 2 ($35 copay).
Symptoms began in November 2008, ~4 weeks after giving birth to my son.
Eased for ~3 weeks in December, possibly b/c of probiotic use?
Returned in January 2009 (with a vengeance), diagnosed with pancolitis on January 30.
Currently taking Asacol (400mg 4 pills 3x daily), Rowasa nightly, Culturelle probiotic, and Zoloft (25 mg).