I recently made this quilt and UQ from Momentum 90 and 900 loft down. Made each in an afternoon/evening.
Quilt weight 420g, with 5cm baffles, and 200g of 900 loft down, and an even 5-6 cm loft. Foot box made using drawer cord across the bottom, and 3 press-studs over 18" along the lower sides to hold them together (could also use zipper)
UQ is a minimalist tapered design that attaches to my HH with 6 press-studs (one side are fixed, and the other side are on short sections of elastic, to provide some "give", when moving in the hammock). Separate elastic drawer cords on the edges and top to tighten/loosen as required. UQ 160cm long (ie may need foot pad), and about 250g (100g 900 loft down), again about 5cm loft. The picture shown has lots of string - it was taken before I finalised the attachments to the hammock.
Both comparatively easy and cheap projects.