I built a garage something like that for a guy close to me. Separate heat, AC system, bathroom, internet, separate satellite TV systems. His did have the 4 post lift and the most important feature, an intercom so his wife would fix him a sandwich.
Her house, his garage they got along great till the day he died.
Not at all, he worked, she kept house. He was happy to bring home the bacon, she was more than happy to fry it for him. Union sheet metal work was his trade, died of cancer. He did a ton of work at power plants around asbestos left over from the old days.