How difficult/time consuming is changing the arms, drop-links, etc? I have axle stands and and a driveway to work in, but that's it.
So what are you going use when it's on the stands, the force?
Work with both sides of the car on axle stands, if you only put one side on a stand the ARB will be under tension causing all sorts of problems.
One you've done them a few times the uppers could be done in an hour (both sides). This will depend on which way round the long bolt through the mount has been fitted. From the factory it will have the head facing the inner wing meaning it cannot be removed without dropping the strut and removing the upper mount/wishbone as one.
If it's been turned round so that the head is now facing the outer wing the wishbone can now be removed by removing the wheel arch liner, splitting the upper balljoint and removing the bolt. When refitting it is essential to pop the metal collars out of the rubber bishes and applying a generous smear of rubber/silicone grease.
Drop links shouldn't be too hard as yours have been replaced in the last year or so, there will be a 'flat' on the spline of the balljoint one can get a spanner onto so as to undo the nut, the very early drop links had no such flat and all one had was the hole in the end of the spline to insert an allen key, these invariably rounded off and one had no choice but to cut the drop links off.
The lower wishbones are another matter if you haven't done them before. Depending on the make some line up better than others, even originals don't look like they're ever going to fit. Could easily take you a day to do both sides. When tightening the long bolt through the lower wishbone put a jack under the hub and lift it so that it's in the sort of position it would be on the ground, if you tighten the bolt with the suspension hanging the bush will be in an unnatural position and will twist when the car is back on the ground.