And what was the square footage of that building? And how much square footage of space would normally be required for each furnace and work/processing area? I'm curious to hear how you are qualifying "huge" in this case, steve accountant. The assumption at the time may also have been (quite likely, in fact) that they were going to add more equipment on an as-needed basis, so they would want enough space to grow into without having to find larger space too soon. An entirely logical supposition for anyone even remotely acquainted with how to run a business.
The "besides to fool investors" part sounds like pure unfounded speculation to me, and unlikely to have been the intent when the building was first chosen. I would like to see documentation to support such a claim, though undoubtedly none exists given the unlikelihood of the claim.
Since when did BI produce anything other than demo hardware at the Drexel site? Production hardware was produced at another facility in Tucson. It makes a lot of sense to get rid of a building and utilities that are not needed. BI can produce and sell when they get the books in order, get their liability insurance, and a QA program in place.
It also makes a lot of sense to travel several blocks to pick up the mail rather than a 40 mile round trip and waste time and fuel.