Mod Suggestions/Requests (movement and money)

Is it possible to mod either the player speed in certain stances (like slowing how fast the player moves while crouch running) and/or control the rate stamina drains from certain movement (like adding stamina drain while crouch running)?

And secondly, controlling cashflow for the player somewhat, simple overall control variables like buy/sell price in itself would be great, but choosing the sell price of items specifically?

In the same vein the item drops, can the gun/ammo drops from NPC death be disabled? And can the rates of items gathered from looting and skinning be controlled (like having chances of finding no loot, or no pelt, i.e. damaging it while removing it, same for feathers etc.

And/or controlling the amount of NPCs (animals and people) that spawn randomly, or how often they spawn?

Also lastly I have the no hit markers mod, but can it be extended somehow to the info that comes up when hovering over an animal. I really don't like how it displays the pelt value, or that it comes up with anything at all frankly.

Trying to be concise apologies if these have been addressed before, appreciate any input.