If you're gonna drive from the port of Oakland to Moab, budget about 17 hours of travel time, including stops for gas and food. It's about 1100 miles, and is best done in 2 days. You can take longer if you'd like to do some sightseeing along the way. For example, you could drive the southern route through Las Vegas and I-15/I-70, you could see Bryce, Zion, and/or Capitol Reef National Parks. Sure, it might cost you a little more for gas and/or lodging, but heck, you've already spent $2600 just to get yourself onto the mainland! What's a hundred or so more?!

Anyway, don't forget about the time differences as you travel, too. You're gonna be on Hawaii time when you get to CA, so you'll be really sleepy in the mornings, and as you cross between NV and UT, you'll lose yet another hour. Restaurants in smaller cities in UT may close earlier than you expect.