We've spent three weeks on the hard
in Raffles Marina, also DYI, travelift and good stairs, but not sure about the size, might be too small for you, Rebak gives you only ladder and it's a bit far to town as well, but Rebak is much nicer than Raffles. Raffles Marina is rather far away from the town, but Marintech (excellent chandlery) delivers and there is (overpriced!) chandlery
in the marina. When in Rebak, you can go to Satun (Thailand), viz the link in previous post, for cheap paint
(International, but different names), they will can do stainless.
If you need stainless steel
you need to get it in Singapore
or Penang (also by ferry
from Langkawi) or Thailand