I just want to say that it takes a very humble and selfless human to realize that a creature can be better served by someone else. Too often people come to this forum looking for “advice,” only to reject the sage recommendations offered by incredibly knowledgeable keepers. It is a truly kind...
As far as the hosta plant goes, it depends upon which cultivar it is. Hostas range in size from tiny to 3-4 feet when flowering. Do you have a particular one in mind? If you post the name of the one you’re looking to buy, I could give you a more precise answer.
I too have a second level in my Russian tortoise’s PVC enclosure. I created a free standing platform using PVC board. The legs are PVC pipe that are inserted into PVC caps that were attached to the underside of the platform using PVC glue. It was incredibly simple and impervious to moisture.
Welcome to TFO! There are several of us that use cold pressed virgin coconut oil on our tort’s shells. I just use a little after a soak (once he’s dabbed dry with a towel) about once a month. Use a paper towel or a piece of t-shirt to rub a small amount all over the carapace, and then wipe off...
I too realized after finding this forum that I had been doing things wrong while also making too much work for myself! My Russian is sooooo much happier, active and hydrated.
I would advise a beak trim however. It will make eating less of a chore for Tommy.
Give this a read and then come back with questions. It is quite thorough and should get you started in the right direction.