nanoDLP

Hi to all,
i'm new of dlp printer but after one year with my prusa i3 i think that it's time to made a new prokect.
so i wanto to buld m personal sla printer and i want to use raspberry pi and ipad retina display.
so befour staring i have some questione.
1) nanodlp supports retina display resolution?
2) I need to controll only z axis so i need miniaml control ( i think a little arduino with stepper motor driver ) i don'r want to use ramps and mega but arduino uno or nano wit driver. Exist any firmware compatible to made this?
3) the Surface where resin catalize, how it work? i need a specific material? what is the height from the bottom where is the image projected from the retina display?

thx to all