[@Omarnreaper]
Awesome I  look forward to seeing it once it's complete! 
(Side note, armor is just as scarce and useally made from bone, wood, synth, shark leather or whatever kind of leather.Hemp or seaweed cloth is the most common type of clothing [rags] people wear)

[@Gisk]
The limits will be pretty harsh since its a survival RP in a way. So feel free to give the tinker gnome things like, 

Salt water reverseanator: makes fresh water out of sea water but is prone to malfunctioning and breaking.

The self inflateing air raft: a synth air raft.

Small sub: a steampunk style one man sub.

Fishingrod-a-scope: a fishing gadget that can see underwater and catches fish with a sonic sound wave that stuns them. (About as good as a nice rod.

Simple things like that. Tinker Gnomes have lower strength and Dexterity but higher intelligence or tinkering.
Just ask me about a gadget you want if your not sure.