I have tried pressing my own rosin. I went and bought a nice hair straightener and pressed out a couple of buds. Basically it kind of sucked. You spend a lot of time and effort to get a very small amount of rosin. I'm sure if I had a commercial press it would be different but for the home user, BHO is better.
The best thing about rosin is it's safe!
Hey stink, yes I'm very interested in it because of the safe/solvent less factor, (im sure your bho is bhomb) but around here it's not always the cleanest. (Junk)
I'm currently working with two buddies to build a 10 ton hydraulic press and hopefully will average a little above the 20% yeild margin, seeing as we will be having trim to make dry sift from and press that and pop corn buds and such were not to worried about the return because to us the clean pure product is worth it's weight in gold.
I'll update you when we get it set up and pressing.
So far I'm kind of with you with the hair straightener thing, not worth it, I tried with just my body weight and a straightener and it was like you said not worth it, but then we put the straightener in a 600lb dewalt hand vice and the yeild greatly increased, but still having to do 2 and 3 presses. So hopefully the tonnage behind the press will make it worth while. I would love to see solventless be the main stream but I believe your right that from commercial production scheme of things it's not plausible for it to take over bho.
Maybe solventless = medical
Everything else = recreational
(Again not meaning any offense I'm sure your dabs are medicine at its finest and I would be honored to glob it sometime)
Just heat and pressure sounds a lot better in the Medical field I would think then butane and pressure and vacuums.