Hi Mitz,
There are a couple of things you may not have considered, and you probably need to give them some thought.
In a hotel setting, where a bird cage is accessible to anyone who comes in, you will have cruel people who will try to feed a bird things they should not have or try to poke things at the bird...adults will do this as well as children. You say that someone will have to look around a corner to see the bird, then the desk clerk will not be able to make sure that nobody is sticking things in the cage that should not be there.
Also, any of the cages that you have posted are easily opened by a person determined to steal any expensive bird. When the lobby is busy, it is a good time to steal a bird or feed something it should not have or poke at it, because hotel staff are distracted.
I know your idea is to be proud of your bird and to display it, but you might want to re-think placing the cage where people can get to the bird or its cage.....if the cage could be placed behind the counter. If there is an office or store room behind the counter, what is the possibility of installing a large window in the wall, so that people can see the bird, but not get near it.
The other things you need to consider is pest control spraying and carpet cleaning. If the pest control spray is not bird safe, it can kill your bird.....some cities/states require the use of certain pest control products.....are they safe where you live? The same is true of carpet cleaning solutions...some will kill birds.
If your hotel has a contract with carpet cleaning companies or pest service companies, the contract needs to specify that only bird safe products are to be used.
No matter what the advertising says about that plexiglass cage, I would be worried about it getting too hot inside. From the picture, it appears to be open on the top and bottom. Unless there are ceiling fans near the cage, that can create air movement throughout the cage, where a thermometer in the cage would show no more than 65-68 degrees F (keep in mind that a 65 degree temperature without a bird in the cage will not be the same with a bird in the cage...it will be hotter. I would be afraid the bird would get too hot.
Good luck with your new friend.