Your idea sounds nice but we already have seen what local ownership often has wrought. Many states run their profitable parks into the ground and rob them of revenue to fund other programs. The unprofitable parks and historic sites often crumble into oblivion from neglect. Several National Parks and historic sites were at one time adminstered by states who practically begged the Federal government to take them over.
The NPS isn’t my favorite agency but in all fairness, they do a far better job of taking care of these parks than almost any state government would do.
Many states run their profitable parks into the ground and rob them of revenue to fund other programs. “””
Ar3e you seriously suggesting that the Feds don’t have those actions down to a fine art???