10HRS a day is fine.
But what is being considered when setting up a laundry is the quantity and type of clothes you will be washing.
secondly, there are equipment which use gas/elec or steam. which one do you prefer.
thirdly, in a laundry, there are equipment for washing, drying, ironing and finishing....Whats your cost estimate
Work hard at your job and you can make a living. Work hard on yourself and you can make a fortune.