I have seven bicycles, four of my personal use, and three for each one of my wife, stepson and nephew, all of them adult-sized.
My lifestyle involves one or two short daily commutes and a lot of daily errands with one of three bikes (cargo with rack and fenders, wide-tire full suspension, and skinny tire fixie, depending on mood). Eventually my stepson wants to ride and takes his bike out, but this is like once a week. And my nephew takes her bike once a month or less. My wife usually goes out with me on the weekends, so we take her bake and one of mines out).
In my former home, I stored all of them "stacked" beside one another inside the house, so when I had to take one of them, usually I should move all the bikes in front of it, take the desired one out, then put others back, usually ending up with often-used bikes behind less used bikes. That made the youngsters sometimes give up on a short leisure ride out of sheer (justifiable) lazyness to take their bike from behind the "stack"
Recently, I moved to an apartment that has a garage, measuring like 3 meters wide by five meters deep, and about 3,5 meters tall, so now I am free to use it to organize the bikes, plus some cabinets with tools, hooks for the helmets, a tool hanger in a wall, etc.
So the question is - do any of you suggest a way to organize the parking of these bikes in a way that:
- Makes the everyday bikes very quick to take in and out for me, and the less used ones easy enough so the young ones don't have to think twice about the mess when they feel like taking a ride;
- Completely avoids the need to hang or lift the bike. I am sure there is enough space so that moving the bikes around can be achieved by rolling them, either forwards or backwards;
-  The bikes' positions could very well be swappable, since there is seasonal variation on the most used bike;
- Possibly requires the need to move the bikes around a bit to take one of them, for example using two or three stacks of bikes, or whatever.
Here is a poor photo of the actual garage with the bikes already in it, but surrounded by a lot of junk, some of which will be taken out, some of which will be rearranged in cabinets, drawers, etc. (for size reference, the old doors in the back are leaning against the wall). Notice the stacked configuration on the right, where one of the bikes leans against the wall, and the others lean against it successively. I would like to avoid or at least streamline that.