Hi, I'm looking to set up a stand, where customers can access a tablet, my products, and can self-checkout by using a gift card they have previously bought. I also want them to be able to add and subtract items from a list easily. Is this easy for cu...

I'm looking to set up a stand where customers can access products, an iPad or similar tablet, check themselves out with a pre-loaded gift card code, and easily add or subtract items without me being present. Is this simple to do? Thanks!