AAC Prompt Hierarchy -- what does "minimal prompting" mean? How much hand-over-hand is happening? Take a look at this prompt hierarchy and look for ways to scaffold our AAC learners to become less prompt dependent.
White Billy bookcases from Ikea are similar to this and very inexpensive. Cover an entire wall like this in your rental for a designer look at a fraction of the cost. Freestanding units mean you can take them with you, re-arrange to suit, and no trace of them will be left when you move out.