How would you turn Hell into a tourist destination?

You could try, but tourism is already on a decline to the United States

Which ring? Limbo aint so bad, just windy, Oklahoma building codes would be more than sufficent, and you get to pal around with all the famous people who croaked before big J showed up. Real estate in some of the lower rings should get pretty cheap, you would not need much infrastructure for heating and cooling as the tempeature varies wildly between the rings (which according to Dante, are atleast walking distance apart)

I personally would set up an ice rink adventure camp on ring 9. Cocytus does not appear to thaw, so long as you dont mind skating around the traitors frozen in the ice and stay an arms length from Lucifer, you can probably set up a pretty good tourist trap.

Already done.

https://en.wikipedia.org/wiki/Hell,_Norway

The village of Hell has become a minor tourist attraction because of its name, as visitors often have their photograph taken in front of the station sign.

Heaven vs hell can be imagined at a very general level as abundance vs scarcity. Earth can be transformed from a hell to a heaven. A self serve abundance of a hunter-gathering lifestyle can still be heaven. But tourism from heaven to hell where forced servitude provides the abundance to those guests permitted abundance would further mimick the earthly hierarchy.

This was a question from The Middle Ages:

Could the people in Heaven see the people in Hell suffering like a reality show ?

And then we have OP who wants to monetize it like Walt Disney.

You mean New York?