I actually have 3 kiosks for SongbookDB, and all three are mobile.
I use 3 old Motorola Xoom tablets. They are bulky, slow and 1st generation Android tablets. This is on purpose, as no one would want to steal them,
. I paid about $50 each for working ones.
From there, I bought 3 stands, 2 of which are used on a table and are a bit flimsy $35/each. One is similar to a round base mic stand, better made, and was around $75
All in all, I like the kiosks... while we enjoy a lot of regulars, some of them just don't want to deal with the app on their phones... even with all the extra features as opposed to the kiosks.
I will get a few more in the future, but for now, I'm good