Can we charter the boats we see across all the islands that we desire?
The primary limitation is boat location.
Most crewed yachts start from their homeport, but might move depending on the season or specific one way charter requests.
Apart from that limitation, there are other limitations (can the yacht get to the marina – draft), that can be dealt with.
If you have specific request, it is always best to be as specific as possible when inquiring.
"Not what we have But what we enjoy, constitutes our abundance." - Epicurus