A LOT of teams are going to be getting on the QB ride in the next 2 years. Teams right now looking to upgrade are obviously Jags and Bears and Raiders. After that you have the Saints and Colts who are probably are going to be looking for a new QB after this season (Saints might ride with Hill for a year to get their cap in order). Then you have the Bucs and maybe even Steelers who both could very likely be moving on from retiring legends. Lastly you have the teams that will be looking to replace their bad QB whose rookie contract is expiring in Browns, Jets, and possibly Bills. Then there is the wildcard of if either the Giants or Washington TBD's feel strongly enough that they messed up their 1st round pick to dump them after 3 years.
Basically there is no shortage of teams that are going to want and need a new QB. A lot of those teams probably see themselves as a QB away from contending. He absolutely will get paid by one of them as QBs on Dak's level rarely go on the market (and I cannot remember the last time one did in their prime without major injury concerns).