6 years is a long time and by the time you're done with the bond, DSTA experience may limit your options if you intend to change employment, particularly if you want to move into the private sector

how much can your family afford? are there (bond-free) scholarships/bursaries you can explore at the university to help with the fees and living expenses? would you consider a bank loan? (note that you will have to work REALLY hard at paying off the bank loan after graduation. it's an option, but you definitely need to weigh the risks. i know someone who has done this and it's really tough)

if your only option to study at u mich is the scholarship, then you will need to go into the deal with both eyes opened and be aware of the tradeoffs