That's correct — I'd forgotten that, as my project has the open data use license. However, as an example, the one-time $40 for Colorado is likely to be much ch

That's correct — I'd forgotten that, as my project has the open data use license. However, as an example, the one-time $40 for Colorado is likely to be much cheaper than generating them yourself, and is probably adequate if you don't need to keep up to date.