You should join a big size firm. You can learn more there. Full time job might not be the burden if you can work another 6 hours on your loan field. Some of the full time loan persons do not work as 9-6 worker.
IMHO, your MBA will be a good factor for your reputation and professional career but i donot think that can be a main useful power for your loan business and income.
Street smart is your arm, degree is your classy uniform.
Your job is not related to real estate but the philosophical mode grown up in your current job may still reflect your real estate career in the future.
If you do not mind, may i know the field you work now. I do not need the details. I may give you more suggestion to help you.