If you are handy with basic power tools ( ie drill driver, jig saw, circular saw ) , consider building your own Zen type enclosure ( you'll get exactly what you want , and save yourself a stack of $ in the process ( $ that can be used to give the new spikey 4 legged child better lighting maybe ) .
I'd be using
1" hollow square aluminium tubing ( some suppliers will cut this to length on spec , "mill finish" looks OK)
CONNECTIT or QUBELOK plastic connectors ( they are very tight fitting and very strong , in the case of a reptile tank , the joins are strong and firm enough not to been rivets or screws to hold the metal to the plastic connectors - you'll bend the tube or break the connector before they can be pulled apart - if you want to be sure - 5 minute Araldite will do the job ).
and then all you need is some plywood cut to size and some 5mm thick glass cut to size and edge flamed ( to remove sharp edges ) and some plastic tracks.
You'll likely be able to assemble a 4ft x 2ft x 2ft enclosure with a proper solid timber ( plywood ) top and either glass or timber ( plywood ) or Perspex sides ( bearded dragons like to be able see the action ) and sliding glass (or Perspex) doors in a day.
Materials
sliding glass or Perspex door tracks
https://www.cowdroy.com.au/product/p02624-plastic-track-set
Vents ( you'll need 4 high on the warm end, 4 low on the cool end ), drill hole , slip in and use silastic to fix in position.
https://www.ebay.com.au/i/160985134725?chn=ps&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=160985134725&targetid=469489763018&device=c&mktype=pla&googleloc=9072216&poi=&campaignid=1793098937&mkgroupid=74958853368&rlsatarget=pla-469489763018&abcId=1139226&merchantid=107393709&gclid=EAIaIQobChMI2M7wkODX5AIV1YRwCh0gSwsKEAQYASABEgKx_vD_BwE
Connectit joiner system :
https://www.connect-it.cc/
Your local glassier will cut glass to size.
Your local timber & h/ware shop will supply plywood ( I'd get marine ply, it's more resistant to and less absorbant )
Your local h/ware shop will have aluminium square tubes and will likely have Connectit or Qubelok connectors on hand as well suitable tracks for the glass or Perspex doors.
Tips
If you are worried about the weight if 25mm to 30mm thick plywood, consider using this only for the lid and base (where you need to support weight and need structural strength and near zero sagging , and use decorative wall lining sheet like Wall Art decorative plywood 2400mm x 1200mm x 3mm panels , these come in lots of "looks" and are easy cut with an electric jigsaw or use Perspex sheeting ( so the dragon gets a 180 degree view of the world) ).
Make the lid so it can be lifted off or has hinges on the back edge to allow easy fitment of the ceramic (high temperature e27 fittings for the basking globe and the CHE (if you are in cold area)) and the reflector hood for a 2ft or 3ft long T5ho 12% or 14% UVB tube (will also facilitate replacing globes and tubes and cleaning)
Avoid any tank that has a mesh lid or no lid.
Lay ceramic floor tiles ( loosely = no grout no glue ) on the floor as the substrate, OK to lay absorbant paper towels overtop this , some people place lino under the tiles to help keep the tank structure clean.
A domestic inline clock type or digital lamp timer is an excellent investment ( I set my lights to come on at 6am and switch off at 9pm ).
A powerboard with 6 to 8 outlets is a good idea , you'll eventually want more reptilian pets.
If you are going to use a MVB , these are an excellent basking globe BUT can not be operated and controlled via a dimmer, if you are anticipating needing to adjust the heat output of basking globe , a domestic halogen or incandescent flood globe ( colorless ) is a good approach and can be dimmed .
If you are going to use a CHE overnight or to supplement the basking globe's heat output, I suggest you close the loop by controlling both as shown below :
Aim for a basking spot temperature NO HOTTER than 40 degC.
Aim for a warm zone temperature about 35 degC.
Aim for a cool zone temperature about 28-30 degC.
Aim for about 200 microW UVB / sq.cm at the basking spot ( no less than UV-Index 6 at the basking spot ).