Thank you all for the useful information.
An update:
During the second interview I was asked what vehicle I currently drive. The impression I have is that I will need a pickup truck for this job to haul fire damaged equipment (dishwasher, washing machine, etc.) as well as store tools - which means I will likely also need a tool chest for the truck. I will also need to haul fire suits, respirators, and other equipment that would be carcinogenic after exposure to the field, so I will need to be separated from that equipment until I can decontaminate it. I will be onsite for buildings damaged by fire - so I was told I will get VERY dirty. Basically, I would travel to buildings that may have a fire, and I need to haul "evidence" as needed based on site findings back to the company lab.
My territory will be NC/SC. I would not cover TN or GA.
So in short, I will need some sort of pickup truck dedicated solely to work (that I would not use for personal use). I certainly wouldn't need an F350 - I'm thinking whatever has best mpg and is a decent size.
What do I need to keep in mind if I will be filthy? I'm thinking a used truck that is reliable and gets decent mpg. I would go through company training on safety, PPE, respirator and suit use, and how to properly clean after exposure to fire sites.
Based on what I was told, it sounds like I would be just reimbursed per miles at the IRS rate, and not a $700/month 25c/mile.
I think worst case is I buy a used truck, and if I decide I don't like the job just flip it?
Thanks.