Click the link in my signature and look at some real weights. I use a speer type hammock and have for years. I sleep diagonally in it just fine. My speer weighs 731 grams all in. My tarp with stakes and lines for overtop of it weighs 616 grams. I don't use an underquilt. I use a wide blue foam pad (about 250 grams) in the hammock and an integral designs silponcho (262 grams) as an underhammock windblock which I can also stuff insulation into (such as space blankets or some poly batt insulation). Heck, ask food - he saw me three purposing it last week, and I was warm down to the low 40's in nasty wind with no insulation other than the pad and the poncho

But don't get me wrong. Hammocks are *heavier* I could take the same rig and save the 700 grams of the hammock and sleep on the ground. I just would not be as comfortable. If you have a light pad that you can sleep on comfortably, you will have a lighter load with a tarp or solo tent than you will a hammock. On the other hand you won't get me out of my hammock usually except for weather below -10C, or a distinct lack of trees.