if you really want to get silly and have everyone holding nothing but a lasgun then its 160 pts per platoon with 25 guys. getting crazy with this principle a full platoon with nothing but lasguns would be 340. three of those is 1020, plus 3 full conscript platoons at 600 pts and a cheap HQ, thats...320 lasguns for about 1700 pts! ok so tanks might be a bit of a problem but mah!
would be a serious pain in the wallet though
stick to grenadiers if you want cheap $$$