There's absolutely nothing preventing you from building your IIAB into precisely such an enclosure with such a power supply. IIAB is a set of scripts to load the software onto such a box, and they also have a cheap hardware recipe that'll get you going for the 99.9994% of situations where being sandproof is not important.

But you can use those very same scripts to install the content on your sandproof ultramachine. What's the gripe?