To be quite honest; a plumber & test/tag position is not a career, it is a job. It is a job which can pay well enough to deal with the shit.
Find a career path which you will enjoy, stop thinking about $ as you will never be happy especially when you are competing against people without a disability.
Find something which defines you & your intellect/passion.
My friend has a condition & cannot read/write however he is loyal & can think for himself. He took his gym passion along with his loyalty & is now a heavy equipment workshop assistant. He is now showing the ropes to an apprentice & you cant wipe the smile off his face.
If there is a will you will find a way. Stop following the herd into plumber, electrical jobs & start to think about how you can make a difference, what gives you an advantage over the rest.