Hi, Pizzaguy. Since my Crossfire has a manual transmission, I cannot speak to those with automatics, except to say that, according to Remco Industries, automatic Crossfires can be towed with the aid of a lube pump. I will try to answer the rest of your questions to the best of my ability:

I choose to tow my Crossfire for the following reasons:
1. My motorhome's towing limit is 5,000 lbs. An enclosed trailer would exceed that weight, and an open trailer would come pretty close.
2. Once we arrive at a destination (or a campground on the way), it is much easier to stow the tow bar than it is to get rid of a trailer.
3. Ditto for storing a trailer at home.
4. While your assertion that "anyone who can afford a motor home and sports car can afford a damn trailer" may technically be true, I did not purchase my Crossfire or my motorhome new. When I bought my Crossfire five years ago, I paid around $16k, and my 11 year old motorhome's price was about 1/3 of what it cost new. In other words, I am NOT rich.
5. I expect fuel efficiency to be better (slightly) with a tow bar than with a trailer.
6. (most importantly) I have communicated with two owners of manual Crossfires who have towed for years with no ill-effects. There have been no unusual wearing of tires, suspension, drive trains, or anything else on their Crossfires.
7. I have never spoken with anybody who messed up their manual Crossfire by flat-towing. I expect that there are none (other than by doing something wrong).

When I have a choice between safely (imho) doing something more cheaply and more efficiently vs less cheaply and less efficiently, I will choose the former. After all, that's how I was able to afford these luxuries in the first place.

Bill