Not sure why dwarves generally have a Scottish accent but it crosses many takes on fantasy so its not an original PJ take, its become an accepted "norm"
Unlike Gimli however who used his native welsh accent, (odd that some people hear it as Scottish)
Interesting Forbes take on where the money went compared to some people who start with a negative outlook
"The good news is, you can see every dollar spent in the show itself. Quite frankly, there has been nothing like this one TV before, not at this scale, and the first two episodes demonstrated that this really is going to be akin to an eight hour, blockbuster level Lord of the Rings movie. It is absolutely on par, production value-wise, with Peter Jackson’s original trilogy, though whether it’s as good remains to be seen, and we’ll have to see how the remaining six episodes go. But again, Amazon is planning to have this run for years, as a lot of the investment here was in costumes and sets and FX they want to use for a long while to come."