Itinerant worker- no tax home- anyone done this?

Hi!

I will be taking a travel nursing assignment in CA, with the thought that I might move there permanetly. I might also do a couple other assignments around the country after this one... but I see myself eventually in CA. I do not anticipate ever returning to MN, where I currently live. I do not think I can maintain any sort of "tax home" here in MN as I currently rent and will not be keeping any sort of address here and will not be coming back to visit. I suppose I could say that I live with my parents in WI as a tax home... but I doubt that would hold up to IRS scruteny. Has anyone been in this situation? I've read about filing as an itinerant worker, meaning "wherever I go, there I am" and that's my tax home. I've read that this would cost me lots of $$$, but I'm not sure how... the agency is providing me with an apt. Would I have to pay tax on the apt $$$ if I made CA my tax home? Even if so, CA state tax is 6% and 6% of, say, a $1500 housing pay is $90... not fun to have to pay, but not the end of the world. Is that all the penalty would be? WI state tax is higher than CA so maybe it wouldn't be such a bad thing? VERY confused... can anyone help?

Thanks,
Chey