I am unclear on what you are trying to accomplish. You ask for opinions on small and lightweight wheelchairs. Is this intended as an interim solution until the main wheelchair arrives? Or, are you really seeking something small and light?
If you really need small and light, be aware that they can have some pretty limited capabilities for supporting the PALS. I need a full rehab seat and have needed it since before I got my first wheelchair.
Small and lightweight power wheelchairs make serious compromises in range, support, and comfort. Be aware of the compromises you are making if you go that direction.
If a full rehab seat is not needed, there is a variety of small, compact, somewhat portable wheelchairs that seem to go for around $3,000 to $10,000.
If you are looking for an interim wheelchair, I encourage you to try to get a full up power wheelchair from a loaner closet or to buy a used one.
In either case, having a second wheelchair around is great when the primary wheelchair needs to go into the shop (sometimes months at a time for my chair).
Be aware that properly fitting a wheelchair to your PALS is critical. Until you learn how to do it, you are better off going through a local, knowledgeable, professional when you order your first one so that it has a higher likelihood of fitting.
Steve