I feed him one hopper once per week.

It all depends on the age of the snake, type of snake, sizeof snakeand what he's feeding it. Mine is still a baby, he's only about 7 months old and about two feet long. Once per month seems a bit scarce, but if his snake is healthy and showing no signs of ill-health or isn't thin then I guess its ok. Every snake I've ever had has eaten once per week, or once every other week at most. Those snakes were the larger carpet pythons ~19 feet in length and were eating two whole chickens at every feeding.

The shedding schedule could be normal, however if its a python or a boa it seems a bit much. Most smaller snakes shed once per month. The nice thing about snakes is that you don't need all of that fancy humidity equipment, just some water poured into a good coconut substrate will suffice. Make sure that the snake is getting enough water and the tank has about 80% humidity with a temp around 70-80 unless it is a desert snake. The true way to know if the snake is healthy is not by how often he is shedding, but by how complete his shed is. If its coming off in chunks or basically just not in one piece than it isn't healthy. The humidity should be increased (again only if not a desert snake), more water offered, and the snake should be taken out and allowed to soak in a bowl of luke-warm water for about 20 minutes or as long as tolerated.

Hope it helps How long has he had the snake?