Posted: 01/03/2017 at 07:48
There are lots of threads here about bamboo, lb - many of them quite negative I'm afraid! If you put bamboo into the search box at the top of the page, you should find some.
I'm not sure what you mean about 'unrolling' it though?
You can remove upper foliage to leave stems bare lower down - that's quite standard practice as it shows the stems off. You can also remove stems completely every now and again to let some thicken up and give a more tropical look. It really depends what look you want.
In my experience you can buy fairly standard sized potted plants, but they can be quite expensive. It largely depends on the variety you want, as with any plant. The readily available, cheaper ones are often the most invasive. 100cm is fairly typical in size for a potted plant. If it's substantial in circumference, it'll probably be dearer, as it's more mature.
Again, like lots of plants, your conditions will dictate the ultimate height of them. They need a lot of water, so your narrow strip of ground may not be ideal. Many of them are happy enough in shade.