The food dish won't work for crickets or roaches since they'll climb right out of that. You need a glass surface dish. You can find some great things cheap at Goodwill. I love the corning dishes because of the little handles on the side where they can sit. Also I would get the digital Hydro/Therm, the analog ones don't always give a correct reading. Mine never use any hiding-in-things like cork bark or cave. I have a fake shelf fungus with plants hanging over it for their rest area during the day. My female like to hang up in the corner by herself, she's lacking the social skills. I also have layered the bottom with hydro-balls, landscape fabric, soil mixture, eco earth (brick because it's less expensive) then sheet moss Sheet Moss (1 gallon) - Live Moss | Josh's Frogs (love this stuff). The reptile carpet would be to scratchy for the delicate belly skin.
I recommend getting a small 10 gallon tank for a hospital tank and starting your frog there. Use unbleached paper towel on the bottom to make sure the poop is normal and I highly suggest getting a fecal done about a week after to get your new frog. This way you can make sure he/she is healthy before putting he/she in the 18x18x24. This way you won't have to sterilize and disinfect the big set up. I learned this back when I got my 3 little ones in Feb of this year. Ended up having to tear down and throw out a lot of things, I started with the 18x18x24, but with 3 of them I quickly learned this was NOT big enough.
Good luck, I hope this might help, and welcome to the friendly frog place on earth!!
36x18x36 set up for 2 WTF
2 boys resting on the fake fungus covered with fake plant. This is close to the top in the center of back. You can see it better on the full pic.
Feeding dish back when they were babies.