Thats easy. The magic of the Leica. The Leica glow. All the great street shooters use Leica and just look at their pics
It is very difficult "to think rational" when you have that little bug in your mind and really don't have much to compare with. Years ago I sold of two Sigma lenses (24mm and 105mm Macro) because I got convinced they weren't good enough and though they weren't among the sharpest they were actually well above the quality treshold and looking back I see that many of my best shots are done with those two.
Kind regards
I have a pair of Nikon F3HP's, and the F3HP is pretty much the only camera that I use (my Nikon FA pretty much just sits in its' bag), so does that count as "1 camera for a month?"..
There are lower priced solutions.
Sizevise the Nikon F3 is about half the size of your F5 as is the FM line and you can use your current lenses.
If you want a RF (besides your XA) you could go for a Canon QL 17 or if you really want a system camera a Bessa R XX You can even find a R2 A or M used for little money these days but a new one is still cheaper than a used Leica.
Kind regards