If you want fresh veggies and fruit for cheap, go find an Asian supermarket. If you walk in and realize you're the only non-Asian, then you're in the right place.
I can easily buy enough fruits and vegetables to last a week for $15. We're talking multiple serving of both for lunch and dinner for 7 days.
Honey can be a bit more expensive, for me it's about $0.012 per gram when not on sale. I use around a tablespoon in the morning so that's about 21.25g by weight which gives $0.255 in cost. Once again, that's hardly unmanageable on a daily basis. I don't know how much cinnamon you generally put in your oatmeal but a couple of shakes usually does it for me, not sure what it would be if measured but certainly less than 1/4 tsp. and it takes me a long time to go through a bottle (125g) or bag if I buy the cheaper stuff and refill a bottle ;) so the couple dollars I spend on it only gets shelled out every 2 - 3 months.
You can also order those ingredients from amazon:
50lbs bag of rolled oats $57.99 (0.00255/g) [1]
220z x 3 raw honey $28.80 ($0.0154/g) [2]
18oz. ground cinnamon $8.48 ($0.0166/g) [3]
[1] http://www.amazon.com/Regular-Rolled-Oats-Bulk-Pound/dp/B007...
[2] http://www.amazon.com/Y-S-Eco-Bee-Farms-Honey/dp/B000Z93FQC/...
[3] http://www.amazon.com/McCormick-Ground-Cinnamon-18-oz/dp/B00...
The advantage of things like Soylent is that the price is the same no matter where you live, whether you are in a small town with great produce where it's cheap or whether you live in an expensive downtown with limited access.