I have both bought from Hubzu and walked away from deals on Hubzu. One Hubzu home I purchased was vacant so it made the inspection easy. The other was occupied and I revised the offer (which was cancelled).
Regarding the occupied home I could not inspect, I attempted to simply speak with the current occupant and have a civil meeting to see if they would be moving out or would be vindictive and destroy the home. I had also prepared to offer the occupant cash after moving out rather than have to go through the eviction process to create a sort of win-win, rather than a loose-loose (where the angry occupant is forced out and destroys the house along the way). The occupant would not answer the door or respond to a letter, so I revised my Hubzu offer for worst case scenario. The revised offer was not acceptable to Hubzu and the contract was cancelled.
My advice would be: if you cannot inspect the home prior to purchase then adjust your offer to compensate for a full interior renovation - flooring, plumbing, paint, many fixtures, etc.
Of special note:
I'm not sure if it is still like this but the Hubzu preferred title/escrow company was really bad. It was outsourced to a company in California that in turn outsourced to a foreign country. The Hubzu title company created a few errors along the way. One of the errors I did not find until a year after the sale. I found out that my tax bill was being sent to an incorrect address.
Good luck