Set up a VM on AWS/azure/gcp/... in the desired cell, install a VPN server and done. Once you have automation in place it takes ~2 minutes to start, you can run

Set up a VM on AWS/azure/gcp/... in the desired cell, install a VPN server and done. Once you have automation in place it takes ~2 minutes to start, you can run it on demand so you can pay per minute.