If it's hard enough to get doctors to work alongside me, it's going to be a devil of a job to get doctors to replace me.
The indispensable doctor finds that no-one wants to work or buy his practice in the benefit ridden backwater of unemployment that is Tokoroa. He's also finding out that the local ferals on social media do not like his stated income.
Graveyards are full of the indispensable. Shut up shop, forget selling your practice. Your opposition knows how to milk the system and get others to pay. If you haven't sorted your retirement at $400K pa you never will.
As for any residual value in your practice as a saleable business, I'd say you've buggered that in the town going full disclosure about your income. I see your customers deserting like lemmings.
No doubt when the opposition set up shop, all practices were offered a slice of the action. For whatever reason, probably valid at the time, your practice stayed away from their business model, with utterly predictable results.
Now we get to read a sob story.