If you need to dump liquid waste, not all roll-off dumpster are created to load liquid, so that you need to order a special roll-off for this specific purpose.
If you hire a bigger one than required, you may be in spending extra bucks for that free space.
It is hygienically fit if maintained as any other regular toilet.
You don't must worry concerning the transportation charges and assembling cost. More on portable toilets and Biotoi festival toilets can be obtained, as discussed by Keith Barrett.