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Cupboard Installation

Can someone please tell me how much to hang two heavyish cupboards in my garage/laundry area. They will need to find stud to hold the wait - maybe need to brace somehow, the cupboards are about 500x600x300mm each. Plus I would also like a dryer bracket installed in the same area.. I was quoted $500-600 to do this - but that was to build a hutch for the dryer as the guy didnt want to put it on the wall, or $100 for just the cupboards. But I really need to have them up on the wall...