[Artlav]

I've been doing it for a decade [1].

Not a lot of success on the big one - before FPV it was notoriously hard to fly, and after FPV it turned out it was unstable on sharp turns (see crash videos). Haven't gotten around building a next iteration. Latest one is a aluminium-plastic frame, 2825-1100 motors, 3.5Ah 3S battery, about 1.5Kg weight. Nicknamed flying guillotine due to it's bush-chopping 10x3.8 props.

The small one ("Acro") performs very well as an indoors/training quad. 3D printed frame, 800mAh battery, 1811-2000 motors, about 300g weight. Held together with zip ties across stress points, with connections angled as to be flexible on impact but lock solid under static load. So, you can crash it all day long and only need to replace the zip ties or props occasionally.

All had custom flight controllers and software, no ideas on that front. Not sure about the prices, since all the core parts were bought years ago.

[1] http://orbides.org/pepela-gal.php