Be honest with the employees, and tell them they will be hired as half time, and the benefits will last to come.
Try to manage a small but efficient employee team.
Make sure the employe get the best support and benefit so that they can give their best to make 7-eleven great
Where I work had no security and I would definitely add
Let employees have dicounts on various products in store and $10 voucher for a day / person to use against food and stuff.
Pay more money for the work that is required