Asking advice and completely ignoring it, why do some people even bother coming on here
The set up you're buying is crap and overpriced. It won't house an adult and you can get much cheaper at many many shops, online shops or the classifieds on here if you buy everything separate.
At 18 months old your beardie will be a decent size and will be very squashed up in the 3ft viv.
If you want to see a good set up look at the link in Tom's sig above