You can tow it with a car, but then you get this.
My parents moved from Indiana to California in 1949 pulling a trailer all the way. It was large enough for them to live in for a few months, so not too small. I am fairly certain my father had a Dodge at the time, probably a straight 6. It was no big deal.
We have had the Shadow Cruiser for over 2 years, 76 nights of use and 11,000 miles towed. We have had no problems with the trailer in that time. The awning failed early, but that is not the trailer and was repaired under warranty. There have been some axle issues with these trailers, you will need to confirm the correct axles are installed. Also, push the dealer to replace the tires, the factory tires are bias ply (not radials) and don't last. The trailer is light weight, so some compromises are made. The cabinets are made with light weight plywood and screws don't hold well. The chassis is not a robust as some would like. I pull with a Silverado with a 4.8l V8, tow package, rated 6300 lbs. Uphills the RPMs get high, but overall I have not problems.
Finally, if you search on my name you can find some other information on my experience with this trailer.
You will get a lot of opinions on this. We visit DD in Las Vegas a lot and travel Cajon pass every time. I barely use brakes down that grade.
Also, Disneyland just upped admission prices, $92 per day, either park. (Was $86.)
In my research on Cruiser RV I found this Youtube video of the Australian Importer touring the Cruiser RV factory. The importer name is right there. Anyone interested in any of the Cruiser RV products, take a look at this three part video. Actually, anyone wanting to get a look at how travel trailers are built, look at this. Cruiser is in the heart of Indiana RV building country.
Unfortunately you are in Perth. If you can get to Melbourne these guys are importing and selling Cruiser RV products. You could see and touch a few. They are modified for the Australian market, but built on the same assembly line in Indiana as the US market trailers.
We have had a Shadow Cruiser for 2 years now, using almost once a month, and have had no problems.
You will be fine. I tow a heavier trailer with a 4.8L and 4 speed in my 07 Silverado. I am able to go over Cajon pass and Tejon summit out of the LA basin at 60 mph, i just have to be in second at 4000 rpm. You will do much better with the 5.3L and 6 speed. Don't overload the truck so you do not push the rear axle weight rating and you will have no problems.
I tow a larger Shadow Cruiser, the S260 BHS. I have an '07 Silverado 1500 Crew Cab, 4.8, 4 speed, 3.73 rear end. It tows great on the flat, I can usually keep it in overdrive. On hills I usually am in second at 4000 RPM to hold 60 mph. Living in Orange County, CA, almost anywhere I go involves climbing at least one grade, but I have over 10,000 miles towing since getting the trailer June 2011 with no problems.
We have the S260BHS. I have made a few posts on this trailer, just search on my name. We have had our trailer for about 18 months, with over 50 nights and 8000 miles towing. Here are some of my observations. First, confirm the weight. 6 months after we bought ours we got a new weight label from Cruiser RV adding 700 pounds to the dry weight. As far as quality, there are some videos on YouTube showing construction in the factory, so you can see how they are put together. There are some choices made that seem to indicate they are trying to use better materials: stainless steel kitchen sink, Marinco power cord, alloy wheels, Beaufloor flooring. Other choices are for weight, especially the cabinets. Doors are solid wood and plywood, but the carcasses are built with lightweight plywood wrapped with vinyl. Screws do not hold well in the lightweight core. Most of the other fittings are basic RV, lots of plastic, the most basic appliances, etc. The big slide really opens up the floor space, but you may not be able to access the bunkhouse or bathroom with it closed. Many people find that important, it is not to us. The only issues we had were one loose piece of trim, no signal from the antenna and the awning broke (Dometic issue.) All were repaired quickly by our dealer, Family RV in Pomona.
The reason you won't see trailers like this in any quantity in the US is price. The first one has a 21 foot box and is priced at almost $52000 US without options. The second one, with no bath room and 16 feet long is $17500 US without options.