I honestly don't know if any owners are more loyal to a location than money.
The thing of it though is that you can make both sides happy. If St. Louis is really so far ahead of other cities in getting this done, have them be top of the list if some other franchise wants to move, while in the meantime Stan gets to do what he wants with his team. Capitalism in action.
I don't think the circumstances of the NFL allowing the Rams to move will be as dire as you make out since at this point, St. Louis has no commitment to anything above what it cost to make the drawings and what it cost to hire Peacock and Blitz.
The relocation fee issue has been discussed a lot, and many don't feel it will be as huge an issue as some hope or even not an issue at all. The fees can be reduced or waived by the NFL at will, and there is precedent for waiving them, as the fees were waived for the Raiders' return to Oakland.
I don't think Stan would have played this as he had if he felt there was more revenue in staying in St. Louis. It has been pointed out before that he has an established track record that he likes to own, not rent.
But at this point, we're pretty cyclical into "I think the owners will do this." "No, I think the owners will do that." so I'll lay off for a little while at least.
No points in arguments where, at this point, neither side can be proven wrong or right.