Yeah, I didn't see any real strategy. I mean, if the Dodgers left Price unprotected, which happened in this scenario, would a team not draft him then market him to other teams offering to pay down some of the cost. For instance, Price is owed $64M over the last two years of his contract. Would it be possible for the expansion team to get a couple of top 100 guys for him if they paid down half his number ($32M) or take back some dead salary from the other team? Maybe. Teams pay posting fees all the time for international FA (Japan, Korea, Cuba) to get young controllable talent. An expansion team is not going to be competitive right away, no matter what. In fact, it's against there best interests not to be as bad as possible early in their existence, given how new talent (non FA) acquisition is set up for MLB.
For example, Could they draft Price and trade him plus $10M for Happ, Severino, Jasson Dominguez and Luis Gil? Severino just had TJ, and is in his second year of a 4/40. They looked to trade Happ in the offseason and his $17M for 20 and vesting $17M for 21. Dominguez is supposed to be a top prospect but has yet to play an inning of minor league ball. Gil is a high ceiling guy with control issues. Then the expansion GM keeps Severino to be your future staff anchor, trades Happ for best available and brings along Dominguez and Gil slowly.
That's just a thought experiment or what if. You could apply the same logic to any number of guys (Inciarte, Smith, d'Arnaud, etc.)
The concept is simple in that you are using a trade to buy prospects by paying down the cost to the ML guy. It's the opposite of what the Braves did with Kimbrel.