Hi, I am Billy No Mates and I ride a trike. Except when I ride a bike, of course. Actually I'm Billy No Mates all the time, whether I'm riding the bike or the trike, or paddling the kayak. I think it's a function of my existence.
Bikes can be left in the hallway or a room, leaning against the wall, but Speedy needs proper storage. I live in a terraced house, and the trike will go through a standard doorway, and can just about be wrangled through the house, but it's tricky. We have a ginnel between us and one neighbour which gives access to the rear garden - which a lot of terraces don't have, of course - and that's how the trike is normally moved.
Back when I visited Seat of the Pants in Altrincham (about 1995-ish) Bob Dixon had several Windcheetahs suspended down walls hanging from their rear wheels, which I thought was a pretty good method, but even then they stick out into a room unless you also remove the seat. Garage or secure shed seems best.
The speed thing is also true - Speedy can be very fast on the flat (it is: I'm not), and scary fast on descents, but as soon as there's some climbing to do I slow right down.