To each his own. IMO,if I were to approach my neighbors about any form of plan,or set up some group connected by cell phones, I'd EXPECT to be on some list and probably visited by homeland security as an organizer of a Right Wing Radical Supremist Xenophobic Homophobic Transphobic Islamophobic Misogynistic Racist Heavily Armed Satanic Militia Terrorist Hate Group.
.I'm far closer to Mr Rogers,neighbor. Did you bring your sweater today?
But no,I have not organized a neighborhood paintball league.
I prefer not to advertise "Burglarize here if you need guns" So I'm quite low key.
And I have no control over what fear demons my neighbors might conjure up. Scared people are dangerous. I don't want anyone to be scared of me.
I don't even have a Gadsen Flag. No bumper stickers.
I don't go near protests,demonstrations,or rallies. I vote.
Ill run away every chance I get.
However,I'm uncomfortable with the idea of being helpless. IMO,it does not matter how well stocked your arms room is,or how "Really Cool" your guns are.
Sure,its fun to optimize, but when Clint Eastwood said "Get off my lawn" holding his M-1 Garand, he was "Well armed if needed"
As would John Wayne and his Win 92 and Colt.Just go ahead,tell him "Thats bold talk for a one eyed fat man" Fat shaming and mocking disabilities is quite politically incorrect. See what happens next.
In the book "Unintended Consequences" a character illustrated a man with a single shot 22 is not to be trifled with.
Unless you are a member of some militia, you are likely a lone armed man.
Likely your threat is within handgun range. Likely if there are more than three of them,armed, you had better be very good.
We aren't going to have a fire support unit.No overwatch snipers. Can't call in an A-10.
I'm old and painful enough I can't even run. I'm not Bruce Lee. Nobody has my back.
Well armed if needed? I usually have a 45 or 9 mm within arms reach.
I watch the 1970 movie "Little Big Man" Chief Dan George 's character gave his death speech. "Its a good day to die" I said that once,to a guy who had a loaded Mini 14 pressed to my skull. Then I said "But first,I will have one more of your beers" And I turned my back on him,walked to his refrigerator,and popped one. He could not win. He could have killed me,but he could not beat me.
I'm going to die. When? Who knows. Its a good day. Knowing that,What do I have to fear?
I would prefer to die without regret. I would prefer to die well,whatever that might be.
If I must be killed,I prefer to die in a pile of my own hot brass.
I can be "Well armed if needed " with a 45-70 Rolling block.
But by far, I'd sincerely like to pass naturally,without ever shooting anyone.
More toward the OP's question, if you have something in the class of a good service pistol backed with an M-4 clone ,an M-1 Carbine,or an AK or SKS,or a Mini-14,or even a 357 or 44 mag lever action, You can put up a good short term fight against any fight a lone man is likely to encounter and have much chance of surviving.
You can't spend enough on guns to be secure. But having one you can put your hands on is good.