You'd be better off getting your hands on a used copy of PC lightwave and use it. Just some real world numbers.
In 1995 when Lighwave 4 came out on the PC, on my 100Mhz Pentium processor (Not 2, not 3, Not 4, not even a Pro), the dual spacecraft scene from lightwave, rendered 10X faster then with lightwave 4 on a stock 25 Mhz 68040 4000. I did a whole article for VTU about it. A throwaway P3 laptop will easily do 100X or more faster then your Toaster system, so use it to generate your lightwave frames, save them as Flyer clips and move them to your flyer when you get it.
-Tig