Frank,
Cabinet Vision has several different levels. I started with Standard, but quickly moved up to Advanced. It was still too limited for me and I now use Ultimate. With Version 9's release some of the features that were only available in Ultimate, are now part of advanced.
Anyway, the most important thing to consider about Cabinet Vision is: If your not willing to pay about $1000.00 a year for support, I wouldn't buy it. The support that Cabinet Vision provides is excellent. Its the best I have seen. It includes free upgrades and fixes, along with the forum. The forum is the best part. Monitored by techs and users that know the program better then the back of their hands. For me with out the support I would never have been able to use it. It took about 2 years to get comfortable with it and after 5 years I'm very confident with it.
So. I'm not sure what it costs now, but I would suspect it is about $4000.00 to $8000.00, depending on the level. You'll have to check with them. It's worth a look, even if it is just to rule it out.
Also, have you looked into Mozaik(Not sure of spelling)? It is rental only and includes support with a forum. It is similar to Cabinet Vision. And is used with sketchup from what I see.