I think you should use a Ruby on Rails app to consume API streams. From there you can scale as needed. I haven't done much freelancing, but I've spent years building systems that migrate data. I don't know much the automotive after market but I looked into the SDC and they indicated they have an API of some kind that we can ping with a scheduler.
I could bluff and tell you that I can build this in 3 days, but I think at least 5 days would reasonable considering there will likely be a round of follow up to ensure you have what you need. I work full time as a developer so I'm only available nights and weekends. If you give me a week, I can develop a stable rails app that fetches your data each day. You would have an easy to browse, minimally designed, highly functional, single page, server side rendering front end that can easily be moved or built upon .
At my day job my company bills my time at $100 USD an hour. I'm coming in at a low bid because I don't have any reviews and I think this job could be fun.