Hi Luiz,
Good to hear you're going to be in town. I can't really suggest a good cheap place to stay as I usually just do the hour drive south to get there. What I can do is recommend a number of operators that I'm sure will be more than what you expect.. They are (in no particular order):
Quiescence - they run three, 6-pack (6 divers max) boats. Boat captains for very knowledgable of the area and the operation is superbly run.
Dual Porpoise - Capt. Scott is great. A marine biologist with a great passion for what he does. You should defintely ask him to take you to places that are 'off the beaten path.' He's a big macro critter (blennies especially) fanatic. There are some mentions of hotel/dive packages on his web site.
Diver's City USA - Barbara and Bob run a great setup. They are big wreck fans and you can easily access the Duane (ask them about doing a night dive on it - advance dive), the Eagle (neat wreck!) and tons more.
If you'd like, let me know when you're in town and I'll try to meet up with you for some diving. I might be able to find a critter or two in my backyard. 
Laz
PS - Check out my web site for a pic or two of the wrecks including the Duane at night (Ocean Gallery -> Last Week's Photos).