I don't have all the terminology down, so pardon me if I use the wrong words here, but if you have a flatbed printer, are you looking for a CNC router, or a CNC cutter that has a router head attachment? BIGGGGGG difference.
I would think if you are printing flatbed, you'd want to contour cut stuff like coroplast, sintra, etc. You'd need an electronic eye to know where all your work is. You're not going to get that type of stuff with a $30,000 CNC router made to cut out signs, etc.
You'd need a cutter made for that that has the blade on it, the eye on it so it can pick up registration marks and cut your profiles. They have various heads that go on them, so you can put a lightweight router head on them and cut denser materials than the knife will cut.
Those machines are also well above $60,000, probably closer to the $80-90,000 range.
If I said something incorrect, someone please correct me.