You're not allowed to use Starlink in other location than you ordered. It's not for nomads.
https://www.starlink.com/legal/terms-of-service-preorder
6.3 You acknowledge that you are only authorized to access Services at the location identified on your Order, and you will not divert the Starlink Kit or Services to any other locations
What the price options looks like in 12-24 months time is anyones guess. Personally I'd love to buy 250 dishes (at full price, $2k each or whatever), but skip the monthly charge (or have some sort of pool agreement)
The hard part is cache invalidation! For a stationary Starlink dish, every satellite knows which cell a given dish is in, and they cooperate to route packets to that cell when they can.
For a mobile Starlink dish, they have to be able to invalidate that cache every time it moves, instead of having a cushion of a few hours for the occasional move.
It can be done, but I don't blame them for punting on that problem for awhile.