Tangier was not in the 5* marina league unless things have changed since over 10yrs ago last time I went there, it all depends how long you want to stay I guess.
For an 18mth reboot for your
boat a couple of days is simple enough, a longer stay with no one on board... dunno.
This is the new marina being built, how far along it is you would have to contact them and ask but the aerial picture looks impressive..
Fhttp://www.tangerport.com/en/the-new-marina/