Prior to meeting with the attorney it would be good to prepare a "purpose statement" that describes the activities of SudoRoom that qualify for non-profit status. A few other hackerspaces have acquired 501c3 status. Here is an example:
The Geek Group provides access to science, technology, engineering and math by developing programming and facilities for individuals and institutions to learn, explore, innovate and play at an independent pace according to their needs.
Obviously the educational activities of Sudo Room would qualify as a public benefit or charitable purpose. There's also a number of other qualifying purposes having to do with community welfare, defense of human and civil rights secured by law and so on.
Once 501c3 status is obtained then it is possible under California law to acquire tax a foreclosed property for the price of taxes due only. There are a number of interesting properties available in Oakland that would serve your purposes.