If you are using stock cabinets, 20-20 has a nice DB of manufactures units to choose from. If you are building custom, then try KCDW which will not only do the rendering, but also the cutlists and CNC info if required.
None of them are cheap, but if you do alot of kitchens, the investment will pay off.
It's possible, yes. However, I have no idea about your abilities, so I cannot say if it is possible for you to be able to do it. A "timely fashion" would also be relative to the clients. Some may be twiddling their thumbs after 5 minutes, others may be patient enough to last for 2 hours.
E cabinets is a good program, the UI is really cluncky right now but I understand that the next version will be much more intuitive and user friendly. You need to be a licensed contractor or cabinet builder or someone in the industry to get the program (free) but real good things for kitchens and cabinets can be done with it.
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