Shindaiwa 15kva @ 3 phase.  12kw @ single phase in like new condition.  Low hours.  155 to 300 on most.  A  few with 500.   1 with 1000 hrs 1 with 2000 hrs  and 3000 hours 
There are (32 ) of these in stock 
Kubota d902 engines 3 cylinder diesel 60 gallon fuel tank portable on trailers but can easily be removed from trailers.   Very small compact and  super quite 
They are also capable of doing 3 phase and single phase at the same time.   Multiple connections and outlets.  $7500 each will make package deal on multiple bought at once