All components have been sourced using the helpful BOM tool from Octopart. Would recommend this tool for anyone searching for components. The BOM can be viewed here. All components are available from Digi-Key, so only one order is needed. In total, there are 42 components, with a total price for all components for a single board equal to $208.54 as of 11/17/19. No surprise that the GPS module is the most expensive (~$200), but that's expected, given that it's a very precise GPS module. If you're looking for very high precision but also don't want to spend thousands of dollars for extremely high-end GPS modules, I would recommend this specific GPS module. Doesn't have to be my board :)