I would think private server would put additional cost on the developer's cost which they probably cannot put in at the moment so unless you yourself are willing to pay for it, there is 0% of a chance of happening instead of 0.1%.
Alternatively, this is a game that is somewhat of a more single player "Haven and Hearth". http://www.jmp.fi/~smaarane/urw.html.
Be warned, there is an AI raider faction.