Appraisers don't own businesses, they own jobs.
When the individual is absent, everything changes.
If you could run an appraisal business of that magnitude, it's only like a sliver of the challenge to set one up.
I've seen several 'appraisal business purchases' and these annoying things like client retention, underwriting agreement, lender approval, and such concerns seem to get in the way of the next guy recreating the magic.
Could a door to door downtown window washer who knocks on each door and rakes x per unit, have an accredited business he could sell based on net earnings? Appraising is door to door for this consideration. The product is an intellectual art. Do lawyers sell their businesses? They probably have contractual agreements if they do. How can you sell a business when there is specific lack of client commitment agreements in 100% of the client base? Talk about a limited buyer pool.