I agree with Charlie, upgrading your existing system may not cost much at all. Unless your computer is from Dell, HP etc. you can usually keep most of the parts and just buy a new processor, motherboard and RAM pretty cheap. Maybe a video card too. I know I could get the above for less than $500CAD and it would handle FS2002 pretty well.
Dell and friends like to pull fun ideas like making their own custom power supply and case designs that make upgrading difficult.
goates