What relationship do dwarves and half-orcs have in Golarion?

I am just writing an adventure around the dwarven and orc history. In my party I have a dwarf and a half-orc (we have not played yet). Reading the Pathfinder Handbook Dwarfes of Golarion it is quite clear that they absolutely hate Orcs. But there is no information about the relation to half orcs. Is there any source with information about it?

How do dwarves get their food?

The Basic Rules says, “Dwarven kingdoms stretch deep beneath the mountains”, and various other sources give a similar picture, of dwarves living in subterranean communities. Does the 5E source material provide any insight into how they get their food? Do they farm on the surface? Raise crops in caverns? Eat mushrooms?

I’m asking specific to 5E rulebooks and published adventures, although insight from Forgotten Realms lore or past versions could be useful.

Would Dwarves have advantage on Contagion’s saving throws?

Contagion has always been a powerful spell, but it used to be unclear (RAW) what happened during the three (or more) turns a target was making saving throws. Now an errata has clarified (bold added):

“[The caster makes a melee spell attack] On a hit, the target is poisoned.” The second paragraph now reads, “At the end of each of the poisoned target’s turns, the target must make a Constitution saving throw. If the target succeeds on three of these saves, it is no longer poisoned, and the spell ends. If the target fails three of these saves, the target is no longer poisoned, but choose one of the diseases below. The target is subjected to the chosen disease for the spell’s duration.”

This is a helpful addition: being poisoned imposes disadvantage on attacks and ability checks, so it’s a useful spell even before the disease takes effect. But this raises a confusing question for me: does a Dwarf, who has “advantage on saving throws against poison” have advantage on Contagion’s saving throws now?

It might seem obvious that they would, but failing these saving throws doesn’t inflict the poisoned status: the melee spell attack did that. In fact, failing the saving throw three times will remove the poisoned status (the same as succeeding at the saving throw three times).

So then how does this work? Given that the poisoned status isn’t contingent on failing the saving throw, does the saving throw for Contagion now count as a “saving throw against poison”?

Roughly how much would it cost to hire a team of dwarves to build a home in the mountainside

Since I began dnd I had an idea to try to hire dwarven miners to build it into the cliff side. I am not expecting it to be huge and extravagant but it needs to be big enough for 4 people, one of whom has a large beast companion. This is just something I would be looking for in the future but if the cost is less than I expected I’m going to build it now. Any advice would be greatly appreciated.

Are Gundren Rockseeker and his brothers Mountain Dwarves or Hill Dwarves in the Lost Mine of Phandelver adventure?

The Lost Mine of Phandelver adventure introduces Gundren Rockseeker simply as a “dwarf” and doesn’t seem to mention what kind of dwarf he is. I’ve also tried to look for information about his brothers and it describes each those as simply being a “dwarf” as well.

So, in the Lost Mine of Phandelver text, are they ever referred to as Mountain Dwarves or Hill Dwarves?

It’s just occurred to me that the name “Rockseeker” might be an established dwarf surname in Forgotten Realms lore, which I’m not all that familiar with, so if someone can provide an official reference to any information on the Rockseekers being Mountain Dwarves or Hill Dwarves, even if it’s from other editions of D&D, then that would also be an acceptable answer, but I’d still prefer it if the answer came from the Lost Mine of Phandelver.

The reason is because I’m setting this in my home universe rather than the Forgotten Realms. The different dwarves have different accents. Mountain Dwarves have the stereotypical Scottish accent, but Hill Dwarves in my universe have northern accents (that is to say, North of England, specifically Geordie or Yorkshire accents), so this will affect how I play Gundren (since I like to try and do the voices for my characters if I can).

If it turns out that the adventure simply never states what kind of dwarves they are, then I’ll simply pick one, but I’d prefer if I play them as the correct kind of dwarves if it does say which kind they are…

Would giving dwarves specific racial proficiencies instead of Weapon Familiarity be unbalanced?

I have a player that wants to play a dwarven druid. He’s flavoring the class as a loner that wander the tunnels protecting his settlement from the monsters that lurk in caves. However he is slightly disappointed that the elves get proficiency with a long list of things, but dwarves only get a change in weapon class for two weapons. He’d really like to stick to “dwarven” weapons, but none are available.

Is there anything game breaking about houseruling that dwarves get proficiency with a few weapons instead of Weapon Familiarity, for example: Proficiency with Warhammers, Throwing Axes, Picks, And Greataxes? Or is there some way this can be exploited I’m unaware of?