Here are some ideas. Bear in mind I'm not a pro landscaper, just a passionate gardener...
With an IP, the goal is simply to get a prospective tenant to think "I can sit out here" which has the effect of adding a room, and doing it as inexpensively as possible.
You need to create a sitting/dining area, create a sense of privacy on 3 sides around it, create a garden of colourful plants in the front and one side, and fill up the middle.
Details: that big palm smack in front of the house needs to go or be transplanted as I said before. It looks enormous. Once that's gone it will allow that verandah to be extended so that the first thing a tenant sees is a good size outdoor living area.
Whether it's tiles, brickwork or decking, the area needs to be uniform (same material). It needs to extend to about 2.7 metres from the front wall of the house ( including the verandah). A 4.72 x 2.7 tiled or decked area is great for a decent size table and chairs.
It's also the one part of the property which probably gets the sun in the morning to early afternoon,( so you need to make sure that prospective tenants inspect the property in the morning).
To reinforce the notion that this is an extra living area there needs to be some kind of green privacy screen on both long sides - either with a climbing plant, or a non invasive bamboo planting or a just a dense kind of sturdy trellis. This needs to extend a couple of metres out from the house along those fences. It doesn't have to be high - 1.5m is high enough to give a sense of privacy but it may depend on local codes as to how high you can go.
You say that there's some privacy from the street already so that's good - inside the front fence can go the plants you have acquired.
This next bit may not work with the borders you already have, but I'll throw it in anyway -
You could do some planting in a biggish curve extending from the beginning of the path streetside, about a metre in, around to the end of the privacy screen on the southern side. If you have a few different heights of el cheapo concrete pots with those cordylines they are always good for effect and virtually impossible to kill. The garden doesn't need to have a structural border, let the plants be the border. This means that it's a soft border rather than a hardline geometric one. If you can trim the part of the avocado on your side a bit, it would help letting some light in.
At this point you still have about 9 s m of courtyard left in the middle . Your budget would dicate what you can do - a huge pot with plant or a large patch of mondo grass or put big tiles with mondo grass surrounding them or all of those things. Mondo grass is hard to kill and you don't have to prepare the area like you do a lawn.
Can you picture this? Hope it gives you some ideas.
If this was a PPOR it would be quite different. In that case I'd be looking at changing the whole hardscape to eliminate that long straight path and putting a curved tiled patio extending out from the little covered verandah, adding lighting, doing something with water, creating a hill, some kind of green wall all the way longways on the 2 sides and some colourful plantings and dwarf fruit plants in large pots.