Let's face it. What you are seeking is to be able to enjoy the fruits of the business and avoid compensating those that labored in producing them. In plain words, step into dad's shoes, assume the assets of the business - good will, customer base, business supplies, fixtures, and whatever, but shamelessly none of its liabilities.
Well, there are means by which you can accomplish your goal (as you lawyer will explain). However, after dad has passed and you elect to open the same doors under the same surname, solicit the same customer base, carrying on business much as in the past - mostly likely you can expect to spend a good deal of money and time in a civil courtroom sitting with your $350 plus per hour lawyers defending against his old employees attempting to assert their contractual rights. For you a no-win situation.