Looking over your list, it looks great. The only thing I would say would be to cut some of the blank 6"ers in favor of more anchor tiles. You can never have enough anchor tiles, and they can be used as blanks anyway.

I was originally going to suggest that you print more of the 2 way and 3 way posts, but then I realized that they compensated by there being a lot more in the single file. You will need a ton more mounts than you have right now. You'll need them for every tile. Other than that, it seems to be more than enough to fill your table to the brim.

Sacretis

Am I going overboard? Realistically we will probably play on something closer to 4x8 tiles. I may cut the list in half due to being overzealous and also in hopes of filling needs with future expansion sets.

That depends on your level of commitment. I've now built up a 5x5 tile layout and I've probably invested about 15 hours in it. For the build I've produced:
30- 6x6 tiles
10- 3x6 tiles
4- 3x3 tiles
60- posts
1- ramp
1- stairs
8 sheets of railing (and that's not really enough for me to get variety in my builds)
72 walls

For a 10x6 layout, you'd need to invest more than twice the work I've done. So I'd say it would depend on how much time/patience you have.