When one is looking for an excuse, any will do... /w3tcompact/icons/grin.gif
Seriously, rent one and see if it does what ya want. If yes, and the CFO is willing, pull the trigger. If no, The $$$ wasn't wasted and other equipment can be tested/purchased. Even if ya had to rent a skidsteer with it, (a popular mounting and one rental places are likely to have) ,you should still be money ahead.