BMR is designed to help people who wound not otherwise qualify or be able to purchase a home. It appears that you have other options. You know the risk and only you can determine what amount of risk you are willing to accept vs the benefit of keeping some funds. You may want to discuss this further with a financial planner.
I've had three clients purchase BMR and to date they are very happy. They fully understood the criteria of the program. They elected the BMR because the competition and what was available to them to purchase didn't compare to the new construction. It's not for everyone.
Have an amazing day!
There is a lot to consider when buying a BMR unit. Your real estate agent should have gone over all the furure consequences with you.