People do it all the time. One man companies are commonplace. They come to my door now and then, selling magazine subscriptions, offering to clean my driveway, do yard work, tree trimming, exterminating, carry off junk, do estate sales for you, and so forth.

I remember one guy who had a one man outfit that replaced broken garage door springs. It was all he did. He had a trunk full of springs.

Any decent real estate agent has a rolodex of these people, who are hired to do what is necessary to prep a house for sale.