I've got to admit that I am shocked at what folks pay for kitchen/bathroom cabinets. We got quotes for cabinets for our house and they were equally outrageous. That led to the purchase of a woodshop full of medium-grade equipment and us making our own cabinetry, including solid wood raised panel doors. We spent about $5,000 on tooling and about $2,500 to $3,000 on wood and have made the kitchen cabinets, bathroom vanities, pantries, wash stands, window box seats, tons of custom trim around doors and windows, etc. Cabinet builders around here charge top dollar for what I view to be very mariginal workmanship - i.e. the backs of the cabinets are either 1/4" plywood/luan or nothing; cheap slides/glides for drawers, drawers made of plywood with the plies exposed, 1/4" luan for drawer bottoms, cheap hinges, particle board shelves inside of base cabinets, etc. etc. etc. It literally made me cringe to go look at some the cabinets that these alleged high-end custom homes had.
On the other hand, I realize that not everyone has the time or inclination to build their own cabinets, nor the space to erect a woodworking shop. And I am sure, almost certain, that there are cabinet makers that make good, durable stuff at reasonable prices - I've just never met any.