People thinking they have until 2032 to figure it out are mistaken.
Wheels will be put into motion well before 2032. If there isn't a new arena deal signed, sealed and delivered by 2030 at the latest kiss the Spurs goodbye. , I'd be nervous if there wasn't a groundbreaking ceremony in 2029.
Bennett asked/proposed for the new Sonics arena 3.5 years before the lease was up. 7-8 months later he was filing for arbitration to get out of the lease. 6 months after that he offers a buyout. 6 months later the lawsuit is settled and the Sonics are let out of the final 2 years.
The smart money is on the interests of Seattle or Vegas to start going to war now. I'd be watching for evidence of astro-turfing/fake newsing/bots sowing the seeds of anti-Spurs/anti-public-funds in the San Antonio market starting now, if they haven't already.
A few hundred thousand over the next few years of an underhanded campaign to sabotage any efforts to build the Spurs a new arena will save the Seattle/Vegas groups millions. Fake pro-business or fake anti-tax groups will become active on Facebook and Twitter etc. Anti-Pop rhetoric with regards to his opinions on political or social issues will become more active if Pop is still around to stoke anger amongst the conservatives who will be easily manipulated into being anti-Spur when it comes to any consideration for a new building, even if didn't directly involve raised taxes.
I wouldn't count on the Spurs sticking around.