Welcome here Permajan,
We here do not have suburban areas, as I understand what suburban areas are there.
I do not like really that, but key is to be prepared, as you said:

trading grass for garden and edible landscaping, rain water catchment, passive solar redesign, collaborations between neighbors.

I think most important thing to prepare with other folks, to have your group when SHTF.

Dreamerhps, glad to have you here.

Do not worry about what you gonna say to the friends when they show, you will realize at that time how important is to have priorities. It is you and your loved ones or them.
Or you can as Malgus mention try to check value of their skills.