Stop watching Grand Designs, stop watching anything that hints of a domestic life. After a long day we'd relax in front of Battlestar Galactica - now they had real problems out there in deep space.
Stop looking at Instagram, cut out friends and family that pull faces, head tilt or mention in by Christmas. Hang out with the cheerful, the robust, the ones that can see into the future.
Stop going to the gym, having a social life, doing anything, even cooking complicated meals and crack on. Encourage each other, get a site radio and keep saying 'its an investment for our future'
Spend money on stuff that you won't want to change or you touch all the time, save else where. Children will wreck your carpet and upholstery but not your front door, your banisters, the guttering. Technology dates, keep it simple.
It will pass and then in ten years you'll be sat on your sofa, having wrapped some presents, pottered around the garden and be passing similar information on to the next wave of project home owners. You are not the first in this situation and you won't be the last and we end up with the best homes.