You don't need a full unit - you can just do the seat: http://www.amazon.com/Toto-SW574-01-Washlet-Seat-Elongated/dp/B009IJ2LJ2/ref=sr_1_3?s=hi&ie=UTF8&qid=139

You don't need a full unit - you can just do the seat: http://www.amazon.com/Toto-SW574-01-Washlet-Seat-Elongated/dp/B009IJ2LJ2/ref=sr_1_3?s=hi&ie=UTF8&qid=1396599240&sr=1-3&keywords=japanese+toilet http://www.amazon.com/Toto-SW574-01-Washlet-Seat-Elongated/d... That + drywall + electrical is maybe ~$2500. Sounds like the only expensive part is if you already have expensive deco.