Sorry, I sometimes mention other potential strategies that pop up in my head like Apprentice/Hoard. I dismissed it, but I think it is still worth considering, if only for the good habit of not jumping on the first thing you see instantly.
Highway is your economy. You will need some help to get to the first Highway, but I think I much prefer getting Raze to cycle a bit more, maybe spike $5. After that, the job of getting Highways gets much easier, especially with a Duplicate. Forager will be nice to have for the +buy though, so perhaps it is better to get earlier than later, if only to not waste another turn picking one up. Yes, I am convinced. Forager is a better opening buy.