Yep to the shotgun, I keep thinking the same thing. I'm thinking I should map out a budget so I'm not feeling this either or pressure, start with the G19 because it's available and a cash sale, then get a shotgun, etc, maybe a new one every 3 months till I have one of everything.
Seriously, how hard will it be to secure a shotgun in case someone breaks and enters when I'm not here? The house is ridiculously large, 5 doors on main level and some pre-broken windows, that is why I decided I should be replacing the 100 year plus doors with steel, etc, before introducing firearms into the mix.
And yes, if an intruder comes once we've retired to our quarters, I will definitely be dealing with the top of the stairs situation, unless I am in the library or laundry room downstairs, or an altogether different suite down there. It's all confusing, but simpler since we moved upstairs, although I did leave out an old exterior staircase leading to a piece of plywood in a doorway to an enclosed porch with steps up to a door to my bedroom. Very confusing house, great for envisioning tactical scenarios ad nauseum.