you could get one with 400gb LTE data for $80 a month: https://www.onlinewirelessmall.com/att-hotspot-49-99prepaid-...
or there's these ones that don't have a cap??? https://www.onlinewirelessmall.com/att-netgear779s-with-plan...
or buy a grandfathered plan off of ebay that has truly unlimited (no throttling) for less than $100 a month
or there's dozens of other options with hundreds of GBs of data per month that are a fraction of the $600 a month you're paying. There is no reason to be paying that much and there are other options you haven't considered.
I'm not familiar with that area but my mind boggles at this amount. What kind of speeds do you get? Are that ISP able to offer a cheaper deal of some sort, eg 12 months? Why is it so much!?
Wishing you well, I hope you get Starlink soon in your area, or any alternatives.
There was also a brief stint of time when I lived in Europe in a long-term Airbnb that didn't tell us there was a data cap (and since we weren't real residents, we couldn't set up our own internet) and I got nearly $500/mo for a few months doing video calls for work etc from my LTE.
They may ration service to a few people in big cities but i'm doubtful they will offer it at all to be honest.
I could be wrong but my guess is they will blacklist areas near cities entirely at least to begin with and focus on very rural areas with literally no alternative (no LTE etc).
Personally I think Starlink is going to have capacity crisis quickly if takeup is anywhere near as strong as demand seems to be and I'm sure SpaceX know this, so by fcoussing almost entirely on very rural areas (and maybe niche commercial/govt uses in more urban enviroments) they have a chance at managing demand a bit. Or they will start ramping up cost of service and/or putting very punitive bandwidth caps on (like all other sat providers).
I still think Starlink is an amazing breakthrough, but it really is a solution only for the 'last'/most rural 1% of households (or less).
By definition I think the places that need Starlink the most won't hit density limits. But I think a lot of people will buy Starlink just because it's Starlink -- anything so their dollars aren't going to Comcast.