I was going to suggest bootstrapping a Cray super computer to the board to crunch numbers (since there is no FPU), but even a full implementation of the 32-bit bus on an A4000 limits the accessible ram to 1 GB (you need addresses for the hardware) and on an X1000 is around 1.8 GB (barring extended memory mapping).
However since there exists a working design with quite adequate RAM for its market, why not start there? Then later, once the Cray addition is up and running, add more RAM.