Who would be interested in meeting up?
I'd be happy to meet up again, but I'm only about 30 minutes south of you, so it wouldn't be much of an adventure.
hitchiking, buses, and trains
Travel by train can be surprisingly fun if you wander and talk to people. Trains seem to have a larger portion of travelers who aren't quite so much as interested in being somewhere as they are in enjoying the trip.
logistics
Never used it, but you might consider checking out
couchsurfing. Worst case, 30 days, if you can average $80/night at cheap hotels that's only $2400. Look around and it's usually not difficult to find $40-$50/night on weekday nights, then rates go up on weekends. Reservations are almost never necessary. I've walked into hotels at 6-9pm and asked for a room for the night and never been turned down unless there was a convention going on. Often you get a lower rate doing that than booking in advance. Also, ask at the lobby for a corporate discount and they'll usually take 10% off.
Alternately, if you want something more adventurous and if funds permit, you might consider purchasing a cargo van and putting a bed in it plus a water heater heater for washing. Hunt around on ebay/craigslist, you might be able to put together something reasonably livable for a couple thousand dollars. For example, checking
ebay I find suitable vans for under $4000. Then spend $500 fixing up the interior to make it livable. According to
a fuel economy site from OC to San Diego to Seattle and back to OC is under $500. More than greyhound, but with the benefit of being able to stop anywhere at any time for however long you want. Go to apartments and use the coin operated laundry facilities when you want to wash clothes. And both colleges and public beaches usually have open shower facilities, so you won't always be bathing in the back of your van with a bucket.
Then when you get back, turn around and sell the van. If you can break even on the van, you only end up paying for food, gas, and whatever you spend fixing the van up to live in it. If you can eat on $20/day, after selling the van you could potentially end up spending all summer travelling the coast for under $2500.
But be forewarned: once you've done something like this it's really hard to go back to paying $1500/month for an apartment.