Thanks for the questions.
I need a cash drawer but not a receipt printer. Is this posible?
Yes, but your cash drawer will not open automatically when processing an order. Our cash drawers (and any that I have seen) are designed to open when the printer prints a receipt or the "No Cash" button is pressed. The cash drawer comes with keys you can use to open manually which you can do at anytime.
Also, does anyone have any advice for this type of setup? I will need to use phone for a hotspot, or Ipad mini.
You can either setup a hotspot as you suggest or use a 3G enabled iPad or iPad mini.