As promised, I'm dorking out.
(Edited to add costs, per discussion on the next page)
Unit Designs
Line Infantry[Infantry]: 1x Personal Weapons, size 5, supply 1, cost 0. 1 BP
Machine Gunner[Infantry]: 1x Crew-Served AP, size 12, supply 6, cost 0. 24 BP
Light AT Gun[Infantry]: 1x Light Anti-Vehicle, size 16, supply 6, cost 0. 32 BP
Light Mortar[Infantry]: 1x Light Bombardment, size 20, supply 6, cost 0. 4 BP
Light AA[Infantry]: 1x Light Anti-Aircraft, size 20, supply 2, cost 0. 4 BP
Support Vehicle[Light Vehicle]: 1x Light Autocannon, size 36, supply 7. 5, cost 1. 44 BP
Main Battle Tank[Vehicle]: 1x Heavy Anti-Vehicle, 1x Heavy Crew-Served AP, size 104, supply 45, cost 8. 32 BP
Elite Battle Tank[Super-Heavy Vehicle]: 1x Super-Heavy AV, 2x Heavy Autocannon, size 332, supply 141, cost 59. 76 BP
Brigade AA[Light Vehicle]: 1x Medium AA, size 52, supply 8, cost 2. 08 BP
Brigade Artillery[Light Vehicle]: 1x Medium Bombardment, size 52, supply 18, cost 2. 08 BP
Division AA[Vehicle]: 2x Heavy AA, size 138, supply 36, cost 11. 04 BP
Division Artillery[Vehicle]: 2x Heavy Bombardment: size 138, supply 96, cost 11. 04 BP
Supply Truck[Light Vehicle]: 1x Logistics Module, size 62, cost 2. 48 BP
Engineering Vehicle[Vehicle]: 2x Construction Equipment, size 318, cost 12. 72 BP (assumed light armour, not medium)
Regiment HQ[Medium Vehicle]: HQ size 10k, FFD, size 328, cost 26. 24 BP
Brigade HQ[Heavy Vehicle]: HQ size 50k, FFD, size 596, cost 71. 52 BP
Division HQ[Ultra-Heavy Vehicle]: HQ size 300k, 3x Super-Heavy AV, size 956, supply 243, cost 229. 44 BP
While I know we can have units of arbitrary size now, I feel like 9-10k tons for a regiment is still a good number - they'll fit neatly in most realistic transports, and it matches the Canadian regiment structure(~2000 soldiers) I'll be modelling this around. This is super-generic, and I'm sure more wrinkles will get added, but it's enough to scratch my designer itch.
Basic Formation Designs
Infantry Regiment (Front Line)
1x Regiment HQ
36x Machine Gunner
36x Light AT Gun
36x Light Mortar
36x Light AA
1440x Line Infantry
Total size = 9976 tons
Total supply = 2160/round
Total cost = 219. 2 BP
Armor Regiment (Front Line Attack)
1x Regiment HQ
12x Elite Battle Tank
36x Main Battle Tank
54x Support Vehicle
Total size = 10,000 tons
Total supply = 3717/round
Total cost = 1120. 64 BP
Brigade HQ (Support)
1x Brigade HQ
36x Brigade AA
36x Brigade Artillery
90x Supply Truck
Total size = 9920 tons
Total supply = 936/round (provides 45k)
Total cost = 444. 48 BP
Division HQ (Rear)
1x Division HQ
36x Division AA
36x Division Artillery
1080x Supply Truck
60x Engineering Vehicle(fortifies 6000 tons without bonuses)
Total size = 96,932 tons
Total supply = 4752/round (provides 540k)
Total cost = 4465. 92 BP
Formation Structure Designs
Infantry Brigade:
4x Infantry Regiment
1x Brigade HQ
Total size = 49,824 tons
Total supply = 9576/round (provides 45k = 4. 7 rounds)
Total cost = 1321. 28 BP
Armor Brigade:
4x Armor Regiment
1x Brigade HQ
Total size = 49,920 tons
Total supply = 15,804/round (provides 45k = 2. 8 rounds)
Total cost = 4927. 04 BP
Generic Front-Line Division:
2x Infantry Brigade
2x Armor Brigade
1x Division HQ
Total size = 296,420 tons
Total supply = 55,512/round (provides 720k = 13 rounds)
Total cost = 16,962. 56 BP