With a small business you will always have small profits. That is good for a "mom & pop" business but not enough if you are entreprenurial and interested in building something more substantial. An eventural sale will be executed the way they usually are - to the satisfaction and needs of the seller and buyer.
I am agreeing basically with you.
But if we take this special situation as example...
Master Training I (and later II) were incredibly successful businesses in the old days with Benny Johansson and with the early fame of Mr. Westling. It was really like "skimming milk". They had in one year growth rates of more than 300% (2003 or 2004) Not so surprising, if one is considering, that their exclusive membership was really expensive. They got many members in those years. Their staff didn´t get much of the cake and in fact they had pretty much the same equipment as other gyms (life fitness etc.)
And then they parted and many precious customers went with Benny...and Daniel opened this very big open-for-all gym with lots of staff&stuff...As it seems it wasn´t that easy to get members and they went down with the membership costs.
So I´d say, it would be much wiser to take care of the exclusive clubs...to keep contact to the customers, to give them a feeling of being special. Those are/were a goldmine. He opened one more of them in this golf castle and maybe he would open an other one in these theaters. But of course á big chain would kill the "exclusiveness" and it would be difficult to keep the special attraction and quality (that some of the members seem to appreaciate in experienced Benny Johansson) and there is still Balance, that has to run with profit finally...
So me wouldn´t speak of "mom&pop"-business with this smart concept of exclusive gyms. And I´d have put more effort into them and would have invested the profit into non-gym-related things.
This could have meant a nicer goodbye-fortune for the Ex-gym-owner and new-born prince...but as I´ve said before, I am having my doubts, that he would actually say goodbye...and I am impressed by your constancy in this question. Why are you so sure, that they would marry? And would you assume, that he could keep the gyms as prince?