There is an old adage that you have to remember. TIME IS MONEY. At the very least when doing computers charge at least 20 bucks an hour. I am a horse trader myself. I got in trouble by taking guns etc on trade myself. Not trouble..just kinda stupid to take things that I didn't need. When I moved here to Wyoming I brought 116(IIRC) 22 rifles. The direct result of horse trading. Of course I only kept Winchester Remington and Marlin rifles
The worthwhile ones. Only have about 10 left now. Made good money on 'em. If you horse trade time for guns..never take single shot shotguns..or junk guns of any kind. Not worth doing that. Now as far as working on guns..never make light triggers..especially on autos. I'm saying those words because it seems to me ya just haveta do that work on guns you like. Luck to ya man. Seriously consider getting the licenses you might need. To get the best prices on stuff ya need a business license at the least.