This would be a fascinating design project for an engineer / contractor who could accomplish it. The integration of multiple RE systems basically begs the creation of a "mini-grid" among the homes. It may be possible, though I am far from sure, that what you want to do could be accomplished at the 120VAC level.
Since each house has its own solar system already (I assume) then there can also be many differences between the houses. Not just in battery state-of-charge, but in the capacity of each battery bank, the solar array at each home, the type of inverter used at each, too, and so on.
To try to fairly provide energy to each home, you need something that can't be fooled the the apparent SOC of any particular house's battery. I would avoid building a DC network. The Outback and Xantrex inverters have many features that can make this work at 120VAC, so that would be my natural starting point.
When installing the wind turbine, install a full battery bank at the windmill, a big dump load, and a BIG inverter. In your case, however, your windmill's inverter BECOMES THE GRID. Now feed that among the houses at the Grid input to their inverters. Those inverters will synchronize to the grid, they will charge their batteries from your "grid", and (maybe) can "sell back" to your grid when the sun fills up their batteries.
If the wind hasn't blown in a long time, and the windmill's battery bank gets low, the "grid" goes down, but the houses should manage okay, because they have inherent battery back up!
The Xantrex inverters can also start generators, which in your case could be wired to just "flip on" the grid charging from the windmill's AC output. In your case, the house's inverter would just turn on a relay that makes the wind "grid" inverter's AC available. When the house's inverter detects its battery is full, it would shut off the "generator", which would otherwise just be turning off that relay.
I have probably missed something because it shouldn't be so simple....