How much money should I bring when visiting universities in Krungthep?

What have been accepted into?

Visiting Thai Universities, you are a like a street walker, no University would even let you talk to them.

If it is a visit in any university, including for an event or a short course (without any degree), any visa will do, including exemption or tourist visa, and for that you need to be able to show baht. If you want to attend a course with at least one semester with a degree and a transcript, you must have a full fledged visa in most universities (retirement or marriage visas are fine!).

Are you visiting on a visa exempt entry or a tourist visa? If so you should bring 20k baht in cash or equivalent in another major currency