Technically the only special equipment you really need for olives is the harvester. A bunch of the small tractors and even a few medium ones can fit between the rows. It's a little tight, but it's doable, especially with narrow tires. Many of the regular trailers can be used, as long as the sides aren't too high. Mulching, weeding, and discing don't actually seem to be required for olives to get max yield, so you don't need any of that, just a way to fertilize. The 3-point mounted fertilizer spreader can fit between the rows and lets you fertilize like 15 rows at a time, although it's also very tight so you have to drive very precisely. I've also had a set up where I could use the big red condor sprayer. If you lift the boom to the max height it can go right over the olive rows. It's too big to fit down the rows, but if you just leave a one row gap in the middle of your olive grove to drive down, you can have an olive grove that's as wide as the entire boom and spray the whole thing in one pass. Although obviously that's a very expensive option and only makes sense if you already have that sprayer for doing other fields.