In my experience with this LTW, you are supposed to have 50,000 more simoleans than what you had in cash when the LTW was selected. However, if your sim was made in CAS then you should only need 50,000. Has your sim ever had a different LTW? If so, that would explain the change in number. If not, you could always try resetting your sim. If that doesn't work, I would just kaching my way up to the desired number and then familyfunds it back down to what you really had.