I have a Spotty girl that is 9 weeks or so old. Her home will be a 7 litre Sistema tub until she is about 6 months old, at which point I will probably relocate her to a larger tub, before considering her 'lifetime' enclosure between 8 and 12 months of age.
Size and design of her lifetime home will depend on her size.....I have a 45x45x45 Exoterra that I may put her in at 8 months and see how she goes later on, or depending on her size at 8 months I may hold off and get her a larger enclosure and move her in at 12 months.
I am in no hurry....She is young and very happy in a clear tub where she can see us at the moment. I will let the future decide her final enclosure.