hehe, well, that's an interesting position.. I'd tend to think that unless you're shooting for a pretty good college, it's not really worth the money because your tuition actually funds other people's research.. who knows what the administration uses it on. I'm just speaking from personal experience as a master's student. It wasn't too impressive, and so I quit. Now it might have been different in a renowned or private college.. I went to a state run college with questionable quality right off the bat. It was totally not worth the money and time.
Purchaing a dive op.. hmm.. well, I hear about dive shops going down and going up for sale. There's been a couple in the past half year or so in Miami. Small ops switch hands quite often in the Keys I think. So, it's not an uncommon thing to find these opportunities. It's good you're getting busines education because frankly, alot of the dive ops are not business professionals. They're former boat operators or local instructors who've been in the scene for a long time. Sometimes they run out of business simply because they do... others, I think it's just from poor management and bad business practice. So could you make a difference? it's a very good question.
But comparing that with a family business that I'm guessing is already established and is running fine (atleast for the moment)... I'd keep the family business for sure, unless it's destined for failure. Really, there's obviously a bigger market for trucking than diving. Besides, if it's a family business, you probably know a lot of the players in the local area, have relationships with them, and that makes plan B2 much more attractive because establishing yourself and making relationships takes time and effort, and it's something money can't buy. If you already have it, all the better! Where as if you dive into the dive industry, it's back to page zero unless you're pretty well connected already.
Connection is very important in dive industry. Say you buy PADI education products at price group 3, and you're good friends with another dive shop that's a price group 1 (cheaper). You need 30 OW Go Dive books to stock up for Summer. Do you order them yourself? No, you ask your friend at the price group 1 to order them for you. Say you have a customer who calls in to get a SUUNTO D9. People who want high end gear often already know what they want. Well, you're totally out of D9's. Who do you call? Your fellow dive shop friend!
Not to mension getting a boat captain + divemaster set up and running, if you're going to do a diveboat op.. if you're not going to operate a dive boat, you'd definitely need a friend who runs a boat op.. So, that gets you thinking.
Just some ideas. I'm no expert in starting up these businesses, but I've seen my LDS switch hands, and seen the new owner pick it up. The nuts and bolts of getting a shop rolling was fun to watch.