It sounds like its right down your alley. And a great price for the amount play time it gives.
The maps in this game is called biomes, with mountains snow swamps deserts plains black forests and you get a seed number for your single play or MP map.

The beauty of this game is you can play solo and then go join your friends with all your current weapons food items on your inventory and you can also return back to your solo play with the whatever you have in your inventory.

The base building is a work of art really, you need to use your imagination.
But the upcoming update is about Heath and Home and should add some fun to the building side of it..

I love this game and it's fun solo or with friends.
use friends to help fight the bosses..
Killing bosses is quite a task but not impossible in solo.
You play as a Viking :)
The graphics are just beautiful but at first they seem oddly old style but as you play you become immersed into it the graphics are just so romantic.
There is lots to do and its not too difficult to learn.
Sail long ships and explore.

I would suggest you look into youtube for videos of the game play and tips.
If this game gives you that feeling of interest do your research first.
I've never had a bug glitch or any problems playing it 300 hundred hours.
adding another game for base building.
Subsistence is my favourite game for building far out bases but has no hard boss just ai hunters that can enabled or disabled. We can customize this game.
Is also mp supported.