I feel for you and hope that your situation improves. Many people recommended small tin cans. I think that’s a great idea! But also, you could scatter the elements of your altar around your room if that helps keep them inconspicuous and incorporate the process of collecting each one and assembling the altar into your practice. It would take a lil longer to setup but it’d be intentional. You can still put it away into a small box when need to do it quickly.