The holy Grail, A community that does not need to Scrounge to support itself.
First you need to choose the container fort in Cascade hills as your home base.
The biggest drain on a community is the Materials cost of up keeping Facilities so the first thing to build is a staging area which negates all material costs for your facility.
Then you will need 3 Hydroponic gardens, A Still, Solar array in the remaining large slot and finally an infirmary in the last small slot.
You need command center at level 3 to give 4 outposts, you want to make 2 Medical collection and 2 of them Ammo collection.
if you have the standard 8 people this will give you +1 food per day, +2 Ammo per day, +1 materials a day and your up keep costs will be 0 and your med use per day will be 0 as well.
Hope this helps :)