In 1995, The Rams signed a 20 year contract w the city of St Louis that included a proviso(?) that the stadium it played in would be rated in the top 10% of NFL stadiums. Later, fix up for the stadium was approximated at $750mill but the city offered up only $125mill and the rest of it to be paid by the owner. Say what you will about the owner and the NFL but it WAS written in the contract and the city failed to deliver. The city fathers were depending on the owner, a Missouran, to stay because of local ties but instead made $1,000,000,000 by moving to LA. I think even JimRob would have taken the deal.
I still think the NFL made the move real smooth for the Rams because they were the ones who allowed the NFL to save face and draft Michael Sam.