Yeah you also need Crossbow Expert to bypass the loading property (or an artificer infusion). It is doable though.
Crossbow Expert is required to bypass the loading property, but you still have to abide by the Ammunition property! They're separate.
Who said you only have 1 or 2 hand crossbows? I'm talking about a small bandoleer of them ^.^
A strange quirk of this is actually that you can do it more effectively with one hand crossbow - but it looks odd. You fire the hand crossbow with one hand, free action pass it into your other hand, bonus action fire it with your other hand...
lol nice, just draw a new pre-loaded crossbow each turn! I'm certain nothing bad will ever happen from carrying around 10+ loaded Hand Crossbows at all times. xD
And huh...actually, I don't think you even have to switch hands! "When you use the Attack action and attack with a one handed weapon, you can use a bonus action to attack with a hand crossbow you are holding." It says nothing about "in your other hand" (5e wikidot's description might be incorrect)
I suppose (really, it's just my wild guess) that since a hand-crosbow doesn't require 2 hands to align it like other crossbows, which you're also loading every round while also carrying them with 2 hands, and it's not very powerfull, you're expected to be able to load it just with 2-3 fingers of you second hand, and that doesn't mean you need to put anything away from that hand.
I'd certainly allow it at my table! Or more accurately, forget entirely about the Ammunition property...
