i've been married 8 years now and have 2 children and it get's harder but better.
i highly reccommend buying cheap cars and making them nice and then selling them, you'll learn alot about the automobile trade as well as body work/ paint, detailing, buissness, dealing with customers, making money (even if you're only going to make $200-300 profit on a car DO THE DEAL AND MOVE ON and buy the next car)
my misses is a house wife and doesnt work, but she has plenty of time to be my car sales women it's better having a lady answering the phone and giving details about the car's for sale and generally reeling the buyers in for a sale, the buyers love it too. i know i'd more rather go to see a car for sale thats being sold by a lovely sounding lady than a grumpy bloke like myself.

now go and buy a cheap car and get it sold