I keep a mobi washer in the car (behing driver seat) and keep it topped up with water. The bike gets a quick hose down to get the worst off and a quick wipe down with a towel. The mrs seems happy enough for it to then come into the lounge (cream carpets). The bikes don’t need a hose down in this weather tho.
As far as maintenance, I chuck a rug down on the floor and carry out all my servicing (inc fork oil change, bleeding brakes, building new bike, setting up tubeless tyres) all in the comfort of the lounge. Only once has it not gone to plan where my bike tipped over and smashed an ornament (and nearly had the handlebar smash through the telly). oops
Although the mrs is very tolerant I cant wait till we buy a new man cave with house attached.