Vending Machine Layer

Nowadays most of traditional vending machine are hard to send to maintenance due to heavy weight and the necessity of selling more items on the location at the same time , however I found a simple way to design a new model of vending machines that could help the customer in maintenance and transportation and upgrading.
My design consist of layers , one above one , easy to install and easy for transportation , the customer alone could carry one vending machine in his personal car , and install it by himself. Easy to send one layer to the supplier maintenance if it fail rather than send the whole machine , or can replace one layer with a new model if customer want, and it can be upgraded in the future.