Based on the posted info, it appears there might be 3 models specificically planned with option to add one or more additional models later - one at appx. 3TH, one at appx. 5TH, and one at appx. 10TH.
I speculate (based on the renderings posted info) that this might mean one case used with either 1 hashboard, 2 hashboard, or 3/4 hashboard options (the renderings appear to show space for 3, dunno if they can cram 4 in).
It kinda sound like they came up with a business plan and they don't have any work done beside some sketch and they want money to fund the development. We all know how these things went in the past...
Doesn't seem likely in this case, Lketc has a good rep for delivering on their claims.
On the other hand, actual miners have NOT gone on presale, just the hashing.