This is a big concern for anyone contemplating business school and the answer will vary based on the individual. In general, I believe that a top-10 school is a good financial investment, however, this will depend on your current salary and advancement opportunities (without an MBA). It also depends on the type of career you hope to have post-MBA (and how it may differ from your current position). If you currently work in IT but plan to make a move into Investment Banking then your MBA would be a good investment. I'd research the salaries of pre- and post- MBAs in your (desired) field and go from there.

Also, you mentioned that you already have an MBA. Is this not able to help you move to the next level?? Are you given "credit" for this MBA in your workplace?

Personally, I believe that any education is a good investment (if not monetarily than in other intangibles), but, in your situation, I would suggest that you make a simple investment/return analysis and do your best to estimate the variables. This will let you know approximately how long it would take to recoup your costs (include the opportunity costs!) and then you will feel better with your decision.

Good luck!