I do not know about Baker, but I will finish the MS-ITM (36 credits) from Touro in 15 months by taking 2 classes per semester. I could have finished faster but I had a limit on credits for tuition assistance. I would say the TUI MBA (44 credits) can probably be completed in 15 moths by taking 3 classes per semester.
I am not sure but at Baker they have 4 quarters and each quarter has 2 separate semesters so you can take 8 courses in a year by taking one at a time and double that if you take 2.
