This is where it gets interesting as I know you are low on funds. NO chewing you out as it is not constructive, but I will be blunt. You NEED to find a vet as others have said or you will more than likely watch the snake die.
Do all you can with temps and humidity and research what you can do there at home, but more than likely a vet will be needed.
As I said before, whoever "gifted" you the snakes did you and the snakes no favors. The front end preparation is above all else before the snakes come it includes researching vets and everything. In all reality, if you are not able to care for them or can't afford their care you need to find somebody who can.
Nobody wants to make you feel bad or see you fail, just the opposite actually. Find a vet, drive an hour or two if needed. Usually they can fix you up for home care on the first visit.