easily, the same way you would clad a timber framed stand just a thinner material to fix through. a timber one is possible but it would need so much framing & bracing it may reduce the use of storage inside.
what is your budget? i would guess i'd spend the following setting it up: tank $600, 2 FX5 $1000 or sump & pump $300, steel stand $350, lights $500, panels & hood $300 & this is with building/fitting them myself. so between $1500 & $2500 would be a realistic amount i think with all the other bits & pieces you will need & depending on what you buy new or used.
IMO for a tank of this size a large budget is need. the tank will best be filtered by a sump & placed on a steel stand. What fish are you intending to keep? depending on what you want a narrow & shorter tank may be a better idea. I recently set up a 2000x450x450 which provides great length but it is only around 400L so two cf1200's are more than enough for filtration & a timber stand is perfect for supporting it. it will also be alot cheaper to get running but is still almost 7 foot long.