The only 2 easy options this time of year are to combine it with another one (newspaper combine) or try to find a queen somewhere. I dont think you can raise and mate a queen this late in the year.
If you have a lot of determination you might be able to transfer a frame of brood from other hives every few weeks to keep them alive, but it would be a lot of work, and I am not sure it would work well. You would also be weakening other hives, which might be its own set of problems.
If you have a lot of determination you might be able to transfer a frame of brood from other hives every few weeks to keep them alive, but it would be a lot of work, and I am not sure it would work well. You would also be weakening other hives, which might be its own set of problems.