Starlink Plans 
Local Priority Plan: $65 and up, depending on how much data you want to purchase in the continental USA.
Global Priority Plan $250 for outside the continental USA
Power Supply 
The standard USB ports in the Cirrus SR aircraft cannot support the power requirements of the Starlink Mini, which requires power to either be supplied via a USB C power bank or an outlet installed in the aircraft. Below are reported working Portable Power Stations.
**LiFePO4 batteries - our preference due to reduced fire risk, but requires larger batteries to match LiPo performance.
Anker SOLIX C300 ~>10hrs of runtime
https://www.ankersolix.com/products/c300-dc?variant =4970216 3972426
Jackery Explorer 300 Plus
https://www.jackery.com/products/jackery-explorer-300-plus-portable-power-station
**LiPo Power Banks:
Anker 737 Power Bank (PowerCore 24K) ~2.5hrs of runtime
https://www.anker.com/products/a1289?variant=41974285041814
Anker Prime 27,650mAh Power Bank (250W) ~ 3hrs of runtime
https://www.anker.com/products/a1340-250w-power-bank?cov=d&variant=43739694465174
Power Cable 
Starlink Mini Cable 6.5FT - shorter than the standard cable - helps keep the luggage area cleaner. It appears the 6.5ft cables are made by the same company, I would purchase whatever is cheapest with some positive reviews on Amazon.
