I agree with @wellington they do sleep a lot but something is off if they're actually sleeping 20hr straight. Is it a new enclosure? It does take them some time to get comfortable in their new home he/she could just be hiding or the temperature is off.
Animal plastics enclosures are definitely worth it. They're really great people to work with on getting you the right enclosure. These also look to be a good backup choice I haven't used one personally but I was considering them when animal plastics was something like 4 months out on orders. I...