FWIW, In my experience those two routes tend to be pretty inexpensive for camping/lodging. On the TA we managed to stay for free a substantial portion of the time and for cheap a good bit as well. In much of the country the town parks were OK to camp in and free. There also were quite a few established places that offered hospitality. On your planned section of the coast you can typically stay in hiker biker sites the whole way at $5 or $6 per person depending on the park at least that was my experience. Hopefully budget cuts in California won't ruin that.

Food was pretty reasonable for the majority of the TA as well. The Pacific Coast was kind of pricey in that regard in some places and not bad in others.