I'm also playing around with pricing for my new mobile venture. At the dealership I currently work for they get $280 for a full detail done by yours truly in about 1.5-2 hours depending on the vehicle.
Most people opt for the $190 detail package, and guess what... I USE THE SAME EXACT PROCESS! Sure the packages are worded differently, but when it comes down to executing the detail I use the same method for both details, and I have plenty of regular customers that request me by name every time they have there oil changed.
I should add that there is also a bare minimum package available starting at $80.00, which is basically your standard wash/wax, but I also blow these vehicles out, clean the mats and windows, and condition the seats. You can also use fluffers such as rain ex, or renewing plastics as added options to your higher end details to justify a more expensive detail.
I will probably charge similar prices. I will offer 3 packages, $75, $150,$250, and up charge for large trucks, and dog hair removal. I will charge $40 an hour for paint correction / scratch removal, and when I get to the point where I can mix on the spot I will offer to go around a vehicle and touch up the car for $40-50. I will also offer headlight restoration for around $50, maybe more depends on how much work they need, if they need to be wet sanded aggressively charge more.