Daniel,
The mat is 3/16" reinforced rubber. I bought 75 ft. of it, 48.5 inches wide. The tracks on the machine are variable width, 34-43.5 inches, so it can easily squeeze through a 36" gate. I don't know what kind of grade it can climb yet. I haven't had the need to climb something real steep and I wouldn't want to with a big load. I wanted to buy 3/8 or 1/2 inch mats, but the hardware store here did not have any. It protects the lawn pretty good. I would love to have Alturnamats, but the weight and cost are prohibitive. The 75 ft. of 3/16 inch mats costed me $782.00. You could probably get it a lot cheaper. Freight to Hawaii really adds to the cost of goods here.
I bought a 2002 demo machine for $11,500. All my attachments are new. Grapple $1980, stump grinder $3200, pallet forks $475, multi purpose tool (rippers, tow hitch, lift boom) $500, and I got a trencher and 4/1 bucket new on Ebay for only $2645. Normally the trencher is $4100 and a 4/1 bucket is $2200. The 10K Brimar dump trailer cost me $3995 and shipping for all of the above was $4587.00. Compact Power is where I got the machine from and their website shows a list of used equipment for sale.
The dump height on the Prowler with a 4/1 bucket is about 6 ft. Yes, it would be difficult to lift over the side of a big truck. You will need to load from the back. My next item on my wish list is the mini articulated wheel loader by CSF. 38" wide, telescopic lift arm 9.5 ft high and dumping capacity of about 1500 lbs. Its their SL25 model. These will be exported to the US some time this year....it is European made.