If the client list is so worthless and clients are so disloyal, why do folks work so hard building one and retaining clients once you've earned them?
I've worked in enough shops of many sizes to know that the vast majority of revenue for nearly everyone is generated by repeat business with return customers.
Equipment can age and degrade, personnel in some areas is expendable, but the P&L statements don't lie unless someone is a tax cheat. Neither does good will, organizational proficiency and name recognition. Our craft is no different than any other applied trade.
We have a client who is the plumber we always use who doesn't drive a fully wrapped new truck, have uniforms, shiny new tools, but he is super reliable, very fair, has long standing good will and runs a lean, efficient business. While not needing him often, every encounter is identically positive, and that is valuable to many consumers.
Customers still appreciate and reward proficiency, reliability, value and quality.
To the OP, with eyes wide open and emotionalism stripped away, determine what the components of your business are worth in real world dollars and cents. Given your size, It's likely not enough to live a retirement of luxury, but could be the stepping stone to what you do next.
Good luck and Happy Thanksgiving.