Dsms are not hard to learn on trust me. I've never worked on a Honda so the only knowledge I have on them is just purely engine codes and stuff I used to remember when I was thinking about getting one like 3-4 years back. I'm no where near being an excellent mechanic, but most of the mods that were done to my previous DSM were done by me. Unless it's a tranny rebuild or something like that where I have no expertise what so ever, I can usually do it myself. Anyways, I'll end my ranting and wish you good luck with your fire fighting career and good luck selling the truck and getting whatever you want.