> In case someone wants to build it: my personal willingness to pay is (currently) somewhere between 100-500$ if it is somehow portable like a backpack. A box

> In case someone wants to build it: my personal willingness to pay is (currently) somewhere between 100-500$ if it is somehow portable like a backpack. A box of anti motion-sickness medication costs about €3 for 20 pills and is significantly smaller than a backpack.