Spelunker mob/mining villager and lumberjack mob/villager

Hello, my suggestion for something i would like to see in minecraft is 2 new mobs or villager professions and possibly a new form of structure or two alongside side these new mobs.

I would like to see some form of miner/spelunker npc along with a lumberjack npc. How i think these mobs would work is that you could find them in different biomes across your world and they would have some form of village like structure that you find them at. The spelunker i believe should be found at a little camp like structure where you can find multiple of them, and these camps could generate in different sizes possibly, and as for the lumberjack i believe he should be found in biomes that are quite dense with trees. I believe if he were to have his own structure you can find him at he should have a little log cabin style house where you can find him.

How i believe these mobs should work is a little different from villagers or at least in the case of the lumberjack i think it would be a very nice addition to minecraft if you could pay these mobs a certain amount of emeralds and give them some tools and then they could go mining or go cut down some trees for you. Of course depending on the amount of emeralds payed the amount they collect for you varies, and to keep from them being too overpowered they would have a fairly lengthy cool down of around 3 minecraft days for you to be able to hire them with a price increase and 5 minecraft days for you to hire them with a normal price again.