Re: ‘Seems like waterproof material resting on the foot of your sleeping bag would cause quite a lot of moisture issues.’
Sounds like it is just a DWR, not a WP coating. Something like a bivy bag with a raised ceiling, with an A Frame tarp over it. Tried that with a regular bivy for a trip, because I snore and wanted to give my companion some relief from sharing a tent. We got some heavy rain and a fair amount of wind and water blew in under the tarp ceiling (Hers too, with a different bivy and tarp). Not a good night’s sleep.
With a couple trekking poles not counted, the weight is around 2 lbs with the larger 20D, 1200 HH tarp. So with a spacious solo tent around 2 lbs, I think life would be simpler, and a lot more secure. And I’d still have my one trekking pole – all I need.
The video shots of the cord being precipitously strung over the handle of a trekking pole suggested a lack of real life experience with the designers – not comforting.
So I think a light solo tent would be better, and that’s where I’m headed MYOG-wise.
The modified Goondie, which is way more spacious than a tarped bivy, is 2 lbs 7 oz plus 4 stakes and sacks. https://backpackinglight.com/forums/topic/81307/
Getting a dome shaped tent down to 2 lbs with the Clamshell Hex Tent recently posted on MYOG feels to be within reach, albeit it is a leveraged, not a free-standing dome.
I think 15D is enough for a floor if it is nylon, the coating is Sil/PU and the HH is above 1500 mm. That’s if sharp objects are removed from the pitching area under the floor. Have never used a footprint, with no floor leaks in many years, the nylon on the Goondie floor being 1.3 oz 20D high HH silnylon purchased from Lightheart Gear with the help of BPL posting.
Dry and comfortable sleep and space for storage and moving around, even cooking, seem a better option, especially if there is no significant weight penalty, and the tent is relatively quiet in strong winds.