Unfortunately, as you know, citizens of certain countries get very limited duration visas and there's nothing that can be done other than to apply for a new vis

Unfortunately, as you know, citizens of certain countries get very limited duration visas and there's nothing that can be done other than to apply for a new visa each time that you need to travel. And further, the "portability" available to those in H-1B status is not available to those in E-2 status.