Immunomodulators vs. Biologics

Unfortunately my time has come where I think I need to consider stronger medication. I am currently on mesalamine and that has worked for me for about 8 years. It is now no longer enough. So two questions for everyone, what are your experiences with Biologics or Immunomodulators (ie sulfasalazine)? How do you afford the insane cost of the medications? (Clearly I’m in the US and literally cannot afford hundreds of dollars a dose for these meds)