MiniFloat
MiniFloat is a relatively small floating platform designed by MI&T. It has explicitly been designed with the goal of combining small scale and acceptable motion performance in mind.
It can be regarded as a Sparse Footprint design with Heave Plates for improved heave stability.
Extensive model testing has been performed, but no platforms of this kind have been built yet. No cost estimates are currently available. MiniFloat is patented, but for oil&gas / industrial applications, so this should not interfere with residential applications.