Here is a good site for a kit 3'x2'. One of the best I've seen on the net
http://www.finelineautomation.com/ They have motors and control boxes and cables etc. Pretty good prices.
You will need electronics and a computer and software also. So about $3000.00. There are cheaper solutions but you have to be carfull you don't get junk. Some stuff is free off the net like software and there are plans for machines. I bought a used 4x4 techno router for about $2000 and now I have to spend another $1000 to upgrade it but I knew that going in. Another $2000 for software, Bobcad, training vids, add ons and I got mach3 to run the machine.
There are some good videos on you tube of people cutting out clear plastic guitars from acrylic.
Can't help you out with speeds and feeds. Make sure you make your machine big enough for your needs and a little more. You won't regret having a bigger table but you surely will if it is too small and it doesn't cost much more to add a little size right off the bat. Good luck