I have an MBA and it has opened doors for me, no doubt. But it opened doors to higher levels and oppotunities within my industry. Going into a new industry you will have to start at lower levels where you will be competing with low paid new grads. You’ll never get the financial return on the $$ expense you will incur with having an MBA at this point in your life. Also, for an MBA to be really useful, it needs to be from somewhere accredited or a higher level of prestige than an online program.

My suggestions:
1) bring in an outside consultant to see why your business is failing and make recommended changes

2) sell the business and get as much as you can for it. Then take that money and start another business. Food truck, BBQ joint, etc that you would like to do for the next 10-15 years to retire on