I assume they did not have a survey done?? If they did I'd find a different one for my next boat....
One would hope that the monies they spent which about equaled the purchase price of the boat included a marine survey. The keel bolts and signs of fatigue at the joint are one of the first things they check for on that type of boat.
The boat being high and dry up on stanchions in the boat yard in Tarpon Springs, which has a fine maritime tradition and many competent boat shop's and marine surveyors, for several months presented ample opportunity to inspect the keel. I hope the months spent working on the hull did not mostly mean a Bondo job filling the gap where the keel was separating from the hull.
I live in Clearwater and there are several ASA Schools in the area along with the Community Sailing Center which hold sailing classes for $100 or less and there are also Certified Captains with verifiable credentials who will go out on your own or their boat (they recommend using yours so the training will be specific to how yours is rigged) and spend a day or two giving you personal training for again around $100 and most are agreeable to having your family included for the same price. If planning on circumnavigating then there is also Chapman's School of Seamanship in Stuart Florida which would be the best choice and the couples rate is not bad at all for a 4 day course with accommodations. Chapman's also has donated boats they can sell you and are forthright enough to tell you up front which have known issues are better for blue water sailing, etc.
The Sailing Tubes while entertaining do many times present that you do not need to know how to sail and can figure it out as you go along, highlight gratuitous nudity and present near fatal incidents as humor. Some watch just to see what nasty laceration is the guy going to get this time or for the yoga sessions.
Still if someone handed me the keys to a brand new 2.5 million dollar sailboat saying it was mine if I posted a 15 minute video once or twice a month I might consider it. No nudity but maybe a loin cloth... Just looked in the mirror and we'd better keep it a mystery all covered up in baggies and long sleeves so forget the loincloth. ;>
BTW: Abandoning a boat on public waters or land is a Felony in Florida so the owner can be prosecuted if they do not remove the boat.