I'm being told by at least one builder, who has a complete SFSA interior (carpet, headliner, seat covers, etc., SFSA overhead console, center console and throttle console, but no Air Conditioning), that their RV-10 has an empty weight of 1,600 lbs. I believe this is doable, assuming Eliane's estimate of 80 lbs for everything is correct.
I also believe her estimated weight of the AC system too. I think that the 50lb-ish estimate that the AC vendors try to sell us on does not include the weight of a second alternator, flywheel and some other stuff, that's not included in their kit, but that most people install as part of their AC system. Perhaps Eliane's estimate of 90 lbs added (for the whole AC system) is closer to the truth than the people who love their AC systems would like to admit.
If you're building a plush, mostly 2-passenger-with-bags RV-10, with only occasional 4-seats occupied, which is most people, then perhaps there's enough useful load and CG to have the whole, leather-wrapped, five-toned, double clear-coated, air-conditioned, sound-proofed, multi-batteried, LED-lighted, oxygen-equipped enchilada. However, you'll have to give up some utility. For those of us who truly want full fuel, 4 people and bags utility, it's good to know that we can still have a nice interior (no matter which vendor we use) and stay near 1,600 lbs empty.