For appearance a cedar greenhouse takes some beating.They may be dearer but they don't require much maintenance, nothing to rot, rust or oxydise. I would also go for glass every time.
Nowadays most things can be grown in Growbags so the floor doesn't matter much. Just a few slabs down the middle to walk on . The benches on both sides will be used for growbags , pots, and seed trays.
There is one very important thing , roof lights to maintain adequate ventilation. A greenhouse heats up very quickly and will overheat without plenty of roof ventilation.
I have windows on all sides and the door but it is not enough. I wish I could open up roof windows.