How naive am I?

I am joining this group to find out how difficult it would be to
build a CNC router/plasma cutting table. My application is geared
towards homebuilt aircraft. My goal would be to accurately cut
aluminum sheet to size and drill holes for rivets, and perhaps even
to deburr and dimple the holes too. One of the most time consuming
task of building an all-metal airplane is measuring and drilling the
some 20,000 rivet holes. I am looking at multi function table that
would be able to handle a plasma cutter and router. My design
inspiration is the Torchmate table but this design seems somewhat
expensive to me. Any thoughts? Thanks.