Part of the reason when consulting with new business ventures I ALWAYS suggested that that owners NEVER have their name within the DBA company/coporate name/logo.
Make the association much easier to distance after a sale.
And NEVER EVER EVER EVER personally finance the sale of a business to new owner... EVER!!!! It's a recipe for heartache. Seen too many that see a fraction of the financed amount actually paid. Most go default and lose everything.
What you describe is "bad dealing making" IMO, its possible if the deal is properly structured, a default by the buyer can be advantageous to the seller. I speak from experience.
So if you can't cut a self protective deal, follow the "never,ever......." advice.
Nothing in business is without risk.
