This should be very straight-forward, unless the page to be scraped is extremely unusual, or the CSV has to be delivered in an unusual way. I've written many such scrapers, and it's usually a pretty simple matter of stripping down all the formatting and getting to the key data. There are also often ways of bypassing search forms that makes the process go faster.
How important is it that this be coded in PHP rather than another language? Python has more sophisticated web scraping tools, and while I can make PHP work, Python will probably give you better and faster results.
The 5-day period is mostly because I have other work scheduled for Friday and Monday. If you don't decide for a few days, and end up picking my bid, I'll plan on starting in on Tuesday.