Your plans are coming together well and you are getting some good advice. I will share something my herp vet told me about calcium. I was using cuttle bone like the ones birds eat. The vet said that Tums are a good source of calcium because it is phosphorous free, and cheaper than the calcium powder your normally buy for tortoises. Apparently the ones with the tropical flavor is what tortoises like, not the menthol ones. I am going to try that and see if mine will eat it. I know I have eaten them for calcium and I like them