sight unseen i'd expect at least $20,000? the major cost is labour with plumber, electrician, carpenter, plasterer, waterproofer, tiler, painter, bricklayer, glazier and asbestos remover there's not much easy DIY but savings can be made with careful choice of standard fixtures and fittings (eg a shower stall instead of a walk in shower, tile only where needed instead of fashionable ceiling height etc) ... it costs the same to install cheap tiles, taps and fixtures but the finish and longevity will be disappointing and doesn't save that much for all the effort and expense