Has anyone used overseas jeans for trade show staff uniforms?

I manage events and need to buy matching jeans for 10 booth staff members. I researched options on Alibaba, eBay, and Amazon for bulk jeans and found that most sellers are offering men jeans for $30 per pair with a minimum order of 20 pieces. I would need to spend $600 on the wholesale order. The jeans would be worn for 3 days per show, 4 shows per year.

I am trying to decide if jeans from overseas are good enough for trade show staff uniforms:

• How many washes will $30 jeans from a wholesale site survive before they start fading or shrinking?

• Do the sizes on overseas listings match US sizing or should I order one size up?

• Is the denim weight heavy enough to look professional or will it look cheap?

• Has anyone here used overseas clothing for company uniforms and been happy with the quality?

I want to save money on staff uniforms without making my team look unprofessional.