The process is easy, the current timing with the loan market makes conversion very difficult. Again, talk with Paul about the process.
Some investor specialists do conversions, but there's no one company who specializes. Julie Alexander's company specializes in condo conversions on the legal side, so she will have references. They do about 80% of the condo conversion docs in town and are the closest thing to a "specialist" out there. AustinCondoLaw.com is her site I believe.