I'm fully Int/Builder/Miner spec'd so I get where you're coming from Tea.
On mining: there's a modlet that swaps out the sand+1-ore blocks to a full ore block. Can't recall authors name, sry.
Haven't seen a mod for this but was thinking that the average car would yield hundreds of pounds of mild steel, so maybe mod a big bump in 'iron' from wrenching cars?
Personally glad to hear your team is going to push on as-is, cause I'm betting you all will 'adapt & overcome' and have a ball doing so
-- and hoping you'll have a good story to share with us!
As others have said combining Dart Traps with Electric Fences works very well.
Add a way to channel z's into a conga line and even multiple radiateds can be dealt with.
Simple design in pics is wired so that Dart Traps are always 'ready' via trigger plates.
Electric Fences are on a manual switch for now. Will likely splice in trip wires near top of the stairs later on. But as-is, besides lights on Timer, this draws -zero- watts when idle.
(this is my go-to starter base now. built w flagstone then upgraded along the way. used wood spikes on path for 1st horde night.)
Second pic was with 5 radiated soldiers spawned in, E-Fencing On but Blade Traps Off.
On first circuit darts & fencing killed 2. Other 3 finished on second go around. Without help from me.
Edit: just ran day 28 horde. used ~1150 darts. so 700 raw iron (3500 Iron) to restock.
GS ~220. Ran at 200% xp till lvl 100 (hadn't been past 70? yet, so...). think i was lvl ~115 for horde?
Weren't all rads by any means, but usually 1 or 2 rads in the mix?
Had quite a few dogs, and none of the traps are set at their height, so i spent about 50% of the time sniping cops, z's that got frustrated and took to beating supports, & dogs.
The first E-Fence took about 50% damage. Blade traps only a few damage; didn't bother to repair. Couple columns were almost taken out. That was the only serious damage.