Fascinating stuff. I think I mean to implement the air dam and wheel well skirts on my Corolla. Alternator delete sounds impractical because I do Uber/Grubhub, along with a number of others you mentioned. Might be really impractical to remove the Corolla back seats... on the other hand the whole reason I have the Corolla is convenience, so I guess I shouldn't go that far
I'm wondering if it would be possible to implement the wheel skirts without drilling... maybe with clips and straps?
I think the front dam would be the real challenge. I'd consider a grill block but I'd fear overheating.