For bulk NaOH, have you checked around for chemical supply stores? My area is nowhere near as populated as Denver, and we have three of them here. Their bulk NaOH prices are typically half the cost of purchasing anywhere else and paying for shipping.
In my area, the best price on coconut oil is always at Big Lots - less than Costco, Sam's Club, or Walmart, and far, far less than having it shipped from Webstaurant, Soaper's Choice, or the like. The BL price is typically 12¢ to 15¢ per lb. They no longer offer free shipping over $50, but for that price, I don't mind driving to the store.
I get all the free tallow I need from a friend who raises cows for custom butchering. Well, it's "free" other than the hours of labor required to render, clean, pack, weigh, and label it.
But if I had to pay for it, the best local price for me is at US Foods/ Chef Store, which also has the cheapest price on RBO. I don't think they are in Denver, but there are multiple Webstaurants in Denver, which is typically comparable in price.