I figured since there are two threads on this, I'd reply two times.
If you have a desire to follow a career in Maritime Archeology, then major in that. My university has a program for that.
Center for Maritime Archaeology and Conservation - Texas A&M University
If you have a desire for business management, then major in that. The sports management option could be obtained from a number of universities. One thing you may not have considered is this: With all the universities out there, why is Barry University the only one offering this degree? If there were a high demand for it, wouldn't many other universities, especially those with a strong sports management program or strong nautical background, be offering a similar degree?
You may want to either consider a business or sports management major at a less expensive school and supplement this with the needed diving instruction from other sources. Another thing to consider would be attending a commercial diving school. From looking at Barry's curriculum, it appears there are about 31 credit hours with some aspect of diving. The other 100 hours of the curriculum are non diving related.
One thing you will quickly realize once you are out of school is there is more that you don't know about your chosen field than what you do know based on what was learned in the classroom. Most employers don't think your trained and ready for the job when they hire you. They only look at your degree as proof that you a) have enough intestinal fortitude to complete something and b) have enough intelligence that they will be able to teach you what you need to know in order to do your job. None of them will hire someone with a degree but no experience to run their company. Think back to your Marine Corps days. When you were fresh out of Basic, you weren't put in charge of anything other than your rifle. The people with the experience are the ones in charge.
Best of luck in your endeavors. I would second what others have said regarding your website seeking donations. If you want to attempt to generate donations from it, you need to correct the grammar and spelling. No one is going to feel compelled to donate money toward your education with all the typos, misspellings, grammatical errors and incomplete thoughts. Think of that website as a cover letter and resume'. You are trying to get people to part with their hard earned money. Why should they if they don't think you put any effort into your request?