OK, I have spent the last few weeks looking at land
Found some blocks that I could build the two story house by digging into the slope, but unless I did some serious terracing, I would have no usable backyard or front yard.
so I would also have to deal with stairs, step driveway (just like a few of you said)
Plus I know if there is a small maintenance job the tools/parts are going to be in the garage, not in the basement
So basement games room, 10/10 for cool, minus several million for being practical

So that leaves either a games room or a games shed
I am thinking first of  an attached games room
I still would prefer about 120 square meters (for the games room), add that to a modest house, and that then become a huge house

Now I will probably have to find a wider than usual block to fit it on


I knew I should have taken up stamp collecting