If you're going minimal, I'd ditch the multimeter and have a simple test lamp..
Socket set
Screwdriver set
Plier Set
Gas Soldering Iron
Hammer
12v Drill from Lidl
Drill Bit Set
Adjustable Spanner
Mol Wrench
Oil Filter Wrench
I rather go with 20 too. But I really need to cut the crap. If I admit 20 probably I will give in to 40.Soldering iron doesn’t belong on a boat. Ratchet crimper for heat shrink terminals instead.
Leatherman.
Socket and spanner set.
Screwdriver and cutter set.
Hot knife rope cutter.
Oscillating saw
Drill driver both Ryobi.
Rupes polisher.
Multimeter.
Hacksaw.
I would prefer 20 though.
They are not toolsI am surprised no one said cable ties.
One might wish to debate that one. I am sure many can demonstrate otherwise.They are not tools![]()

Neither Gaffer nor WD40...They are not tools![]()
One might wish to debate that one. I am sure many can demonstrate otherwise.![]()