Any cheap place for a backpacker visiting L.A. to sleep in? -

Im doing a semi backpacking trip this December!I will be going to Portland OR, San Fransisco and L.A. CA, Phoenix AZ and Las Vegas NV!Im looking for really cheap places for a backpacker to sleep and have a shower!Something under 40-50/day Any suggestion for any of these cities? DO Airports in the USA have showers?

Try youth hostels. http://www.hostelsweb.com/cities/losange��Anything else for the price you want and you ll be sleeping with rats and roaches.