Is there something about Boca Chica that makes it the only plausible launch site in Texas? I'm perpetually confused about Elon Musk's seemingly stubborn insistence on using this specific site.
And you also need a 4 mile undeveloped radius from the launch site. It's really hard to find 8 miles of undeveloped East Coast coastline.
OTOH for polar launches you want to launch North or South. Vandenburg is a great site to launch South from, but if Alaska is acceptable then there are many possible launch locations there.
a. it is by the sea so that they are not flying over populated areas b. it is remote enough so that a 1000tonne methane explosion will not endanger anyone or their property and c. it is close enough to civilization so that they have a good access to skilled and un-skilled labour
will have the same issues as they are having in Boca Chica