Making spare parts for loaders and other heavy machines locally

So, let's suppose that the work happens in a remote place with no constant access to spare parts.
The work happen on a medium scale (around 500.000$ revenue a year)

is there is a way to build a small lab to manifucture the needed spare parts on place ? will it be economicly effective ?
are 3d printers a good choice or is it better to go old school.

budget around 200.000 $

thanks in advance