Whats your max number of follow up interviews before quiting the process?

What's the max number of follow up interviews will you entertain for one company before removing your self from the process.

For context I had my phone screen the first week of August, then was invited to a mandatory reception with recruiters, then was asked to interview with 3 different people on the team three different days, now they're asking for me to prepare and present a case study and attend another reception.

This is all for the 1 entry level post college corporate job. I'm starting to get burned out. At what point is enough, enough?

usa jobs
usa jobs resume
usa hotel jobs
usajobs
usa jobs federal government
usa job in ksa
usa jobs
usa jobs login
usa jobs gov
usajobs.gov
www.usajobs.gov
usajobs.com
usajobs
usajobs.gov official