If your house has more than one door, you need more than one. Stop analyzing and buy a Maverick 88 or H&R Pardner or whatever is $150 or so at your LGS (try Walmart first). Get your first security barreled pump, then continue your analysis paralysis.I've never owned one. My Granddad had several on our New York farm so got some experience with the long barrel 28".
Need some advice about 20 or 12 gauge and brands. Right now prices are astronomical if you can find one.
Any suggestions are appreciated. I live in a mountain environment with few neighbors.