Determine how long it takes you to get from where you are to your customers, and draw a circle around yourself. A service business ought to be able to do quite well in a small, intense area. Form a strategic alliance with other companies who are after the same customers, but who are not competitors. Examples are joint printed materials and bus benches. Also, build a database so you can use direct mail.
Nothing happens until something is sold.
However, I'm not sure how to keep my wife from meddling in it. I just don't see how I could be in a business with her and keep the personal separated. I have seen many extraordinarily successful couples who have great marriages and businesses, so it can work. However, many small business owners buy the building from which they run their business. That is an excellent goal, and you own that building personally.