Ken Rumelhart wrote:
I am planning a solo trip to Mexico City in October. Any input on good
budget accommodations, places to eat, things to see/skip.

Ken, Keith took the post right out of my keyboard. He is spot on:

Definitely plan a long visit to the Museum of Anthropology and the pyramids to the north. The Templo Mayor downtown is fascinating, as is the square of Three Cultures. Wherever you are, make note of the fascinating array of public art that is everywhere. The amount, variety and quality rivals any city on the planet. The Shrine of Guadelupe is worth a visit, especially for the grounds behind the main buildings. It's gorgeous back there, with some wonderful works of art...

I spent a day in the Museum of Natural Anthropology and didn't reach
the top (8th?) floor.

http://www.islc.net/~lesleyl/nationalmuseum.html

DB