Just my opinion and its not worth much, you will probably be better off with a cable skidder, if your falling and bucking solo, then a grapple is going to be more machine then you can put to use, like I said though its just my opinion.
The goose neck thing works if you can get enough wood on there to make the trip worthwhile, while still being safe, 1000mbf is more like 1500 actual board feet, and a whole lot more weight then most folks take into account. Just make sure you're not overloading your brakes and trailer...
Loading the damn thing is another question, while its possible to use the grapples on the skidder to load with I don't imagine its easy or efficient...
This is coming from a guy who spent the day loading a dump truck full of firewood logs with a backhoe...
Call around, there may be a mill farther out that is paying a decent price for pine. Phone calls are cheap.
Also call the mills and see if they have any self loader jockeys that they will recommend. Or start chasing down any self loaders you see and get their number... Most of these folks are looking for work anyway, them truck payments are a headache. The self loader folks will have a pretty good idea as to who is a better mill to send to vis a vis, they've managed to keep me out of at least a little bit of trouble... It may seem like a lot of money to pay a self loader to haul your logs, but in the end you are left to skid more logs, they take over the loading, driving, waiting at the mill, dicking with the weight cops, insurance, traffic, flat tires, tree huggers cutting you off... and in the end the amount you would have spent on pulling 3 loads behind your truck is usually less then what you would loose the the loader jockey for one load, not to mention the mills are a whole lot happier to see 5k bf vs 1k.
Now that I reread yer posts and get my head a little clearer... You should be able to use your tractor to load logs with if it has a front loader on it and some girth, just add some fork looking things and go nuts, but be careful its fairly easy to have a log come over the top and pin you to the seat...
Anyway take her slow, look up, observe, make a plan, stick to the plan, and don't be afraid to alter the plan if needed... and look up