I've long respected ham radio folks in general and groups like AMSAT in particular. They've contributed a lot over the years. This would be an exciting project. I'd be willing to contribute to the funds necessary to make it happen and hope others would as well.

If they coordinate their relay system requirements with NASA, ESA, and others interested in sending spacecraft to Mars, they could provide a valuable communications service. Over the past several years, there has been interest in establishing communications relay satellites in orbit around Mars. Some have proposed adding navigation capabilities somewhat similar to GPS. This would be very valuable to landers and rovers on the surface. To date, I don't know if any money has been allocated to building this communications and navigation infrastructure around Mars. If AMSAT can pull this off, perhaps they could fill the need.