In terms of spending money it also goes beyond the MLB roster. Scouting, player development, investment in international infrastructure, etc ... if I had to guess it would be that the Wilpons are nowhere near the top when compared with successful MLB organizations. When one considers the overall value of the franchise it is disappointing - to be charitable.
In terms of selling, absent something catastrophic, I cannot see them doing it. They already have all the money in the world through their real estate empire. Wilpon Sr and Katz are in their 80s - money is immaterial at this point, as it is for their heirs due to the value of the real estate. If they sold what in the world would Jeff Wilpon do with his time. He already has all the money he could ever need. He loves being an executive with the Mets - with Fred and Saul gone he will essentially be the sole decision maker. He is completely inept, but he doesn't think so. Accordingly, I fear there is no incentive to sell, and we Mets fans will be burdened by an even bigger fool than Fred and Saul for decades.