I don't know the legal intricacies of this situation. I believe it is unprecedented and new legal arguments and theories will appear.
U.S. Grant was arrested for repeat offenses of speeding in his horse and buggy in DC but was not jailed. He had to walk back to the WH.
https://www.davemanuel.com/2021/01/11/us-president-arrested/
I do not like to think of Trump in a NYC jail without security including a food taster.
So what's the plan?
Um, that's a weird accusation to bring to a wealthy individual. The argument is WHERE the money came from. Claiming it came from a campaign contribution? But he has lots of income streams. Is every dollar tagged? No.