If you have high OD and PE (for encounter placement- how far away you appear), pitch a tent by SF mine or between SF and Mine.
All you need to make SEC and non-HQ regular ammo is there (EP machine at the mine aboveground entrance).
Also, ruins full of Junk. (BBs and Frags with GP/MP from Mine.)
Also- can scavenge the dead from SF encounters.
(And Remnants/BoS are nearby to farm.)
Plus Gordon's is near (and Redding/Reno), plus Cent farming.
Some hours of the day there are other players, but you are really pretty well off farming the SF area.
Many traders with caps. Try getting Barter to 160 then Salesman for 200. Throw in Karma Beacon and don't attack NPC factions.
Not sure if KB actually works, but try.
High rep/barter will let you get 50-80% value seling things to traders that don't normaly buy them.
In SF this means you get 6 Traders (Doctor, Bartender on Tanker, 2 Tanker Traders, 2 SF Traders) plus maybe a few others you can barter with.
LOTS of caps.