The important thing to understand about this case is the background and what the SCotUS actually ruled on. It's actually rather narrow ruling even if it is extremely important. The court exercised judicial restraint here, and made the minimum ruling necessary. Timbs was convicted of possession/sale/whatever, jailed for a year, and fined $1,200. The state confiscated his Range Rover as well. Timbs sued or appealed the…
> Timbs sued or appealed the confiscation by Indiana, which he he could prove he didn't buy with drug money. Shouldn't the burden of proof of financing lie with the state before property possession is carried out? It is unfair for the defendant to prove the source of funds for his own property
One reason might have been if it was the proceeds of drug-dealing. But that reason is not relevant since he could prove otherwise (let alone whether the burden of proof is/should be on him).
The other reason is simpler: States can fine people for stuff, but (according to the USSC) the fine can't be excessive.