Repair Lab

Being able to scavenge and repair any type of tool or electronic would be an invaluable skill during any long term event.

Sewing is the first thing on our list because we all have clothes that wear out, so it would be the skill that would be needed most.
Repairing electronics is right up with sewing because it is going to be a sought after skill. Lots of people know how to sew, but few understand electronics. This skill will be in high demand and you should be able to be well compensated for it.

The Post Apocalyptic Inventor is the idealized version of what I have in mind, but don't worry if he seems way beyond your skill level. We will start easy and (hopefully) build up to his skill level.