Pricey is relative. A TLB tractor is only as good as the tools that is can use so the rock bits are not pricey because there are only 4 choices when facing rocky soil. Don't dig there ( not an option in rock infested W NC [ see pic] ), use the back hoe or excavator ( leaves a very big hole to back fill, dig by hand and spend 8 hours+ on each hole, or pay someone else to dig post holes. "Time is money" even though I'm only working for myself so everything is paid for in jobs accomplished. As I've said before. I buy only when 50% return occurs within 3 months and fully paid with 3 years.
Tools to date to manage 60+ acres are: 84" 3PH Paladin power rake, 96" 3PH Evrything Attachments box blade, FEL McMillen hydraulic auger with 12" soil & rock frost augers, 30" tree planting auger, 5,550 pound Virnig long forks, 72" Bradco root rake, SSQA CL fabrication receiver hitch, Custom Quick Attach for backhoe to use the abundant KX series excavator attachments ( 18" & 24" trenching bucket, 30" ditching bucket, root ripper). Ultimately the TLB can only do so much so recently added the KX-080-5 to move serious earth, reach longer, and lift heavier loads. Various dump and flat bed trailers.