As some questions came up about the Caldera Mining Company on Discord, I decided to do my homework for once and sift through the source material. I might still have missed something or gotten something wrong, so please do correct me where you see an error.
Trade is the Hlaalu’s primary source of income. Their primary trade has historically been exports and imports to and from foreign lands, even as intermediaries to other houses. They had a less well-established role in internal trade (as the Indoril were trying to occupy that position when trade between houses was not done directly), but it did exist; the recent Hlaalu landgrabs are an attempt to increase their control of internal trade.
The current implementation does not work, for such an outlier as a Dwemer Lich, a sound concept needs to be provided and it needs to be readable for the player. Furthermore, it dilutes the themes of the Dwemer if it is not well explained.
Ashlanders are suggested to have had better lands before being forced out by House Dunmer, which would lead to Ashlander burial grounds extending beyond where Ashlanders are settled presently in the late Third Era.