Mites Static mites or something else? Pics included

I believe a piggy in the care of a family member has mites of some kind. I've noticed the hair on his back/rump area is starting to look dull and just bad in appearance. Starting to thin in a spot as well. I've also been told he has recently become nippy when hands go near him. Possibly from the discomfort of the mites? He doesn't appear to be in pain. He's eating, drinking and behaving normally. No scabs. Supposedly no excessive scratching.

What I have noticed is severe dandruff. You part his hair and it's nothing but dandruff. His skin should be dark colored but it looks white because of it. Also the hair on his back comes out very easily (a few strands at once) and has clumps of something stuck to the ends. I'm wondering if this is Static mites? They are supposedly visible to the eye though? I have yet to see anything moving on him.

I need some advice from people more experienced. Static mites would require special shampoo, but if it's fur mites then I will need to buy Revolution. The family member is very short for money right now, hence why I'm going this route. If you guys think it sounds like something more then I will take him to vet myself. For now I'm just trying to figure out what kind of mite this sounds like so I can try home treatment.

Thanks!