No idea as to how much to tip.
The hardest job , I ever did, was as a furniture remover!
did it for a couple of months, on a working visa in Australia in the 80s............Back-breaking work back then..........the sun shine didnt help either!
Sorry , my thread isnt much use to you....but i still have nightmares! About carrying beds, tables, wardrobes etc etc..up flights of stairs/tight bends etc etc!