Help design a portable crypto mining device

We want to build a small but powerful computer that will mine crypto. It needs to be able to mine the lesser ones not bitcoin, like monero. We need someone who understands what components we will need to build this machine. Im an electrical engineer and can design the battery and mobile power system. So you just need to know how to build computers and how to mine. We need the best but cheapest build possible. And your help deciding what to buy. You will need to work out how much we can run and most efficiently. Take into account internet. Its a mobile project so it might have to run off a phone or probable Internet device. So we need to research those and see what spec they have an how it will effect my mining. To sum up we are designing a mining machine. It need to earn as much as possible. It can be a cluster. It will run on a portable internet device. You need to tell me what the total power needs are so i can build or buy a psu. Take into account cooling and any other computer needs Desired size is about a suitcase size, depending on price. We can start small and grow. We just need a portable mining machine that will make as much as possible. We need a smart, free thinking inventor who is up to the challenge. You will need to walk us through any installations for mining or computer set up so it all runs perfectly. And understand the mining aspects. You will get paid if the project works only. Lots of people habe I have a basic understanding of the componets and stuff needed but need an expert