You can move brush with pallet forks but they are not ideal. I cannot justify a true grapple attachment so I will be buying a "Thumb" grapple from Greens Machine that bolts onto the FEL. It is an economical option at $425 or so, but it will not pick up as much as a dedicated grapple. I will need to add a diverter valve for the cylinder, switch and some hoses. Total cost should come in around $700-750.
I do not log but process about 3-4 cords a year firewood. The other uses for it will be moving brush. I am retired so if it takes me twice as long to get the job done I am OK with it.
The Thumb - Add-on Grapple Attachments
BTW, I have 20 acres with about 18 acres of woods. A $3000 grapple makes no sense for a small acreage. IMHO