Xerox never had any interest in selling for home use, and it was a genuine shock when Apple proceeded to do exactly that, and office workers started bringing their Apple II's to work so they could use VisiCalc.
Something everyone at Xerox would prefer to forget: they rushed out the 820 to stop that shit, a CP/M based PC that they called, believe it or not, "the Apple killer." You probably think I'm making that up.
I was there. Star 1.0 had no spreadsheet, believe it or not. Spreadsheets were in people's minds, but it was way too late to add one in.
Lastly, it's claimed by multiple Xeroids that the laser printers made enough money for Xerox to pay for all of PARC's expenses, easily. I tried to verify that, but it's just not possible.