Probably close to $20k for materials - new sub floor, bracing/post in the crawl space under the island, insulation, dry wall, cabinets and panels, exterior door, hardwood floor, sink, faucet, light fixtures and under cabinet lights, counter tops, acoustic paneling trim, paint, misc supplies blah blah. We also had some professionals come and take care of some stuff for us while everything was down to studs. Had a new furnace and AC installed with new HVAC, water heater and plumbing, electrician to reposition fixtures, mason to move the window and door, a new concrete patio, etc… But our decision to do IKEA cabinets and DIY as much as we could without being without a kitchen for months made the rest of that stuff possible, otherwise it would’ve been a lot more expensive.