Personally with regrets to the structure of these home games , I'm quite happy with the length of time usually they can take just over 2 hours when we have around a dozen runners if their is not a clear chip leader.
Last week I won quite a few big pots with only a smaller field , and HU lasted only a couple of hands despite the number of blinds still in play as I believe I had over a 4:1advantage but had I lost the first all in the HU match could easily have lasted over half hour longer.
Also from a personal perspective with a newborn child much easier to allow 2 hours instead of allowing 4 hours of time.