@DarkAloha
There’s a relatively small pool of sitters available for long sits, by adding further restrictions—such as only accepting couples, requiring a car without providing one, no children , and must have a iphone and stating a strict no-visitors policy—will narrow that pool even more. In our experience, most long sits tend to allow visitors, so these limitations may reduce overall interest from the most experienced sitters .
On top of that, rising flight costs and ongoing travel uncertainty are also factors that may affect the number of suitable applications that you are receiving .
While split sits aren’t always ideal, you might want to think about splitting the sit if that’s what potential applicants (that tick all the other boxes ) are able to commit to.
Split sits can work well if you have a trusted person who can help manage the handover between sitters.
It could be worth considering a back up plan - a paid local sitter who has a car. Either for the full sit or to do the dates that your THS sitters can’t do .The benefit of local sitters is that will have their own transportation and be familiar with what to do in the event of a hurricane.