Go to home depot > go look at electrical junctions > have a nice day
Personally i prefer solid ruins that are only usable as
LOS blockers rather than Area terrain for people to camp on forever (though il admit i have done so my self)
There isnt such a thing as tooo much terrain but generally when you play you want to be able to see the table top
I think the basic each 2x2 should have up to 3
pcs in it at minimum is nice.