A simple setting that adjusts things like ticket prices, costs, wages etc. as a percentage. Say, you wanted to play in the 80s, you could adjust these to 50%, meaning that revenue is 50% lower, but at the same time wages are 50% lower as well. If you’re playing in 2030, you could adjust it to be higher, or very much higher to simulate something like hyperinflation.
Another way would be to take the Out of the Park Baseball approach, with a master setting for each year, but that’s probably more difficult to do.