re: Choices
I'd be happier to devote the money to another space telescope.
The HST is much smaller than Skylab and it only orbits 28 degrees north and south of the equator. Skylab was also oriented in order to slightly control its re-entry and it did fall into the Pacific (and also on Australia where it made lucky guys-imagine owning a piece of a space station that fell on your garden!!).
The HST can also be oriented so as to control the re-entry.