Hello, I can help you. I made my bid basing on $20 / state. If you have 20 locations of total, that's not too big part of work, however, the locations should be added properly following Magento standards, that's why the price is not as low as $10 or even %5 as I'm sure you'll be offered by some cheap bidders.
If you have any questions, please feel free to ask.
Kind regards,
Victor