Personally, I believe a Mun site would lose a lot of beginners interest because it takes out the biggest milestone for every beginner (getting to the Mun).
However if we were able to "build" a Mun base that would peak my interest! For example, land particular Mun base parts on the moon (hoping it would be EXCEPTIONALLY difficult) to build the base, then be able to use it from there on out.
Maybe something like this could be used to build a base anywhere we want? Again, with extreme difficulty