Hi Krypto,
Good question. Like you said, there are various types of sponsorship. There is the kind that I have which helps me with my equipment and health insurance. Other players get a monthly salary and others get that plus all expenses paid. I have figured that if a potential sponsor was to only pay expenses to a tournament it would be around $14,000. That may be a bit on the high end, but not by much. That includes airfare, hotel, entry and other fees, transportation and food. The price of hotel and airfare changes per tournament that is the reason for rounding up.
Hope this helps,
Sarah