Remember ther are 2 styles of grapples. Flat bottom - this will allow you to hold more debris and weighs more (generally used on skid steers). Or a Grapple Rake (better fit for tractors), more verticle handles brush really well and typically easier to use. We stock both - Manufacturers: CID and W R Long.
Don't forget, you will need an auxillary hydraulics at front of tractor. W R Long makes the nicest kit - And YES if you are mechanically inclined can install yourself. You just need basic hand tools.
Tony