Home Tourney Chip Count/Denominations

I am hosting a home tourney of +/- 20 people. Starting chip count is going to be T2000 per player. I have a blind structure of 15 rounds going from 15-30 to 2000-4000. The problem I am trying to solve is that I have (3)- 500 chip sets, all with the same color denominations. I don't have any one color with more than 500 total chips of that color. I have five different total colors of chips (red, green, blue, green, black, grey). Any suggestions on chip values and starting chip stack quantities?