I know it's easy to take of the rail, but still it's a bit tricky to carry it up from my basement and up stairs for every workout and I sometimes hits doors, walls even if I try to be carefull.
It's wonderfull to row outdoors. Less noise from the fan, better breathing and you get sun on your body
I also have a option to store it outside under roof on a smaller porch. It will be protected from rain, but not so much sun there.