This is not where it sits all day- it is normally on the window next to that one (the one you can sort of see in the background of the picture of the whole plant) along with a bunch of other plants. Because it is with so many others and i only have one fan running in the room, that it is probably getting inadequate airflow. (Also my basil keeps growing a white mouldy film on the side of the pots, once again i think it is from lack of airflow). Trying to find more places to put my plants, but living in an apartment with only so many southern windows and no outdoor space is really challenging! I think there is more new growth on it than i realized, but the rate of leaves dropping off to new growth happening was troubling to me :P

Not sure where you are, but there are olive presses scattered throughout California. You go there with your load, and they will give you the oil (and keep the pomace as well as some of your money). An olive press is much more complex and expensive than an apple press. It will be 10 years before you are up to 30-40 lbs of olives per tree per year (and those 100 lbs will give you only 10-20 lbs of oil, which is very little. My family of three uses 30-35 lbs a year. If you do the pressing yourself, you may only get 5-10 lbs). In the intervening time, I would just eat some fresh (fresh olives fried with a drop of oil and salt are wonderful, and not bitter at all while hot), freeze some (they are great in all sorts of stews and braised meates) and cure most of them. Middle Eastern friends do the curing in their bathtub. For bigger crops, water in May through July, but withhold water later.

I never have any problem with them here, other than pollination which can be haphazard here. It looks like something has gone wrong, but if the bark is still live I wouldn't bin it yet. Good luck.

Looks like fungus or disease attacked the branch starting at the wound hole. In the best case it might be possible to save the branch if the cracked bark/dead area is removed along with any soft/decayed wood. Then you could regularly paint on liquid copper fungicide (including under the sides of the rod and on the other side of the rod) until the tree grows around from each side and closes its wound. It would take several years however and no guarantees of full recovery. The next best case you would have to add a wood post to support that corner of the tree house and cut that one branch off below any bit of dead area to prevent disease from reaching the trunk, then regularly paint on liquid copper fungicide until the cut branch closes up the wound over a few years. The worst case is if the tree is deeply infected with any bad disease at that branch, it could spread all the way down to the trunk eventually and kill the whole tree over several years.