I'm at about 75 lbs to give a conservative estimate of the entire bumper weight, and I've got 200 lbs to play with, going by tongue weight (though the identical Australian Forester has a listed tongue weight of 330 lbs - the only difference is they have a stock transmission cooler). With 1 wheel that's an additional 55 lbs. With my small gas can, another 30 lbs.Do you have any idea how much weight you have added by the time you have two gas cans ?? and spare tire and all that heavy steel ? Will you have a trail trailer or camp trailer ?
I'm not sure how the weight of the hitch itself plays into tingue weight calculations, but the average Forester receiver weighs about 30 to 40 lbs and offers the same tongue weights (I think the Aussie receiver is a bit larger).
The hitch itself won't really be used much for overlanding; that's more just for a small utility trailer around town.