Bobcat is made by Textron, makers of Ransomes, Jacobsoen, Steiner, Ryan, Bunton etc...Plenty of folks on this site use them and like them. This particular unit sounds a bit underpowered with a 60" deck 18hp combo. Most commercial ZTR's have at least a 23 hp or bigger for that size deck. I'm not to keen on Briggs motors for commercial mowers. I prefer Honda or Kohler or Kawasaki. Tell him good luck.
We run a Bob-Cat-ZT125 with the integrated grass collection system. Its a 48" deck and the 25hp Kohler V-twin. This will be its 3rd season. Its a great machine, built very well no problems at all with the mower. Cuts wet or dry, deep deck and a good strip without a kit. Your cousin will not be disappointed with the excetion of maybe the Briggs engine and only 18hp.
:blob3: i own 7 bobcat machines, i of which is a 54", with a 25 kohler, besides just replacing the engine at 3500 hours the machine was flawless, i change the belts annually and just keep up with normal maintenence, great cut by the way. good luck i think you'll like them. tony