I haven't seen Norm's (or at least not taken notice of it in a very long time)
I built a router table that fits into the extension wing area of my table saw. But, I reused the route table fence from my old Bosch portable table.
But, here's a loose estimate:
3/4 Baltic Birch (I bought some lacquered stuff for another project and had about a half a sheet left) - $55 (price for a full sheet)
1/2 Baltic Birch (lacquered, had more scraps left over from other projects, probably used about 1/4 sheet) $40
1/4" Baltic Birch (lacquered scraps, you guessed it, leftovers and used maybe 1/4 sheet for drawer bottoms) $28
T-track for fence attachment (I bought 2 48" pieces of Amazon for $30 and used two 8" sections for my table) $15
1/2" MDF for adjust fence faces (Yeah, more scrap, but needed to replace the chewed up pieces that were on the fence) - $20
Two pieces of poplar for drawer fronts (again, scrap) - maybe $10?
The fence I had, had bolts and knobs and stuff, but if I was to make one from scratch, it would take 6 1/4-20×1 1/2" carriage bolts, or 4 carriage bolts and 2 t-bolts. I usually make my own knobs out of wood scraps and nuts, so, another 10 bucks maybe?
I made simple drawers by cutting grooves into the cabinet sides and center supports and slid the 1/4 BB plywood into the slots. Then, built different style drawers onto for each style of storage I needed - bits, tools, extra parts and pieces, etc. Then, built a box out of 1/4" ply to house the router and help with dust collection. The top is simple 3/4 lacquered BB Ply and works nicely. Building a fence would be an easy addition, and wouldn't require any additional materials… There's plenty of leftover scrap from the other parts.
So, if I bought everything specifically for a router table, my total investment would be around $175-ish. But, then, I'd have a lot of leftover material to build at least one more shop cabinet or tool cart, etc….
I built mine in about two and half hours, not including configuring all the drawers (because I still have several empty drawers I haven't figure out what to stick in, yet).