Wolf: I agree, the tuition should be based on what HKBH provides me to pay for tuition. Since this is a separate chesbon from my regular income, one can assume it is also a separate expense; thus, the money left over from my regular expenses we can assume is meant for Tuition. This being the case, tuition should not be more than a few hundred dollars a month since that is all that HKBH allotted for tuition.
In addition, we should not pay 100k for Rabbayim since their parnassa comes from HKBH and they should not rely on mankind to subsidize what HKBH provides.