Poster Sized Seating Charts (HELP)

Hello Ladies,

Crunch time! 17 days to go... yikes!

I am looking to either make or purchase a poster size guest seating chart.....Help!

Most charts that I have priced are about 200 bucks so I am leaning towards making my own.

tips? help? advice?

If you have pics of your own charts, that will be great!

I am literally a zombie.... no sleep... and final last minute ends to tie up!

TIA!