Wrong. To be a museum it still needs to be maintained. Needs the ability to maneuver, to be kept pressurized. Still ability to actively deorbit needs to be maintained. All very, very expensive.

Getting it equatorial is not needed. Just raise orbit beyond 36,000km. Which still needs a huge delta-v.

Unless you lift it up to beyond geostationary orbit which takes a huge delta-v.

I wonder what exactly is the plan. Just get it down enough that the atmosphere will do the rest of the braking?

I guess they will want a targeted deorbit, which means they need to brake with propulsion until it deorbits.

I guess they will keep the cupola. Anyting else? I don't think so.

They can send up a Starship completely built out as a space station.

A booster would be just empty tanks with lots of in orbit work to make it a space station.

It is used at a large and increasing scale. Some does escape. But my understanding is that a big source of atmospheric methane is wells, that are not properly sealed once they are exhausted for commercial use.

Not to mention the infamous cows that release a lot of methane. ;)