I have this product idea of compacting all those AV softwares being used by virustotal into a portable USB device for offline users and people with slow or expensive internet connections. The idea is to send a file into the device for scanning i/o uploading it into VT website. First of all is the idea practical? Is it possible to put all those AV softwares and make them work like they do online? And if yes, who can produce such a device?