All of these were built in single player survival. The tower was a pain I must admit. On the top left corner of the map there is a village if you wish to play on the map. I have not defeated the dragon cause I was too lazy :D. Hopefully you can. There is 3/2 stack of diamonds in the building attached to the mine. Strip mining is just too good. All you have to do is gather ender eyes to go to the dragon. The enchantments are great on both the pickaxe,sword and the armor (I havent made head and boots from diamond cause I wasn't level 30. wanted to enchant them before using)
The nether portal is under the tower (there are ladders)
The alchemy things are under the main house (ladders from the "fireplace"=))
The enchanting place is in the basement floor of the minebuilding.
The anvil is on the second floor of the minebuilding.

Have fun!

I must go, I will upload the world save in an hour or two.