So for my situation it seems my best bet is a 120V 1.5KW VFD and Spindle, then upgrade everything to 2.2KW when I have a place with a 240V circuit I can dedicate to the CNC.
Why do I want the larger spindle and not the 65mm diameter/800W? My thought is a larger spindle will have a larger diameter shaft and bearings so able to handle higher loads. So even though I may never use anything larger than a 1/4" bit the spindle with more torque than the trim router or the smaller spindle should be up to the task. I wanted the ER20 collet to be able to use 1/2" bits because my experience with 1/4 and 1/2 inch bits in routers has shown me that the larger shank bits perform better in most situations.
So looking at this VFD and spindle from www.automationtechnologiesinc.com
