Having presented the garden baseline
here, the time has come to move forward on this little project. Thankyou to those who offered helpful suggestions, both in the comments section and also in person.
My first question is to ask about composting. We anticipate being here a good long while so getting some composting happening to keep boosting up the soil (as well as doing something more environmentally friendly with the carrot and potato peelings than just throwing them into the bin) seems a great idea. We have no composting infrastructure and I am after low cost solutions. What do I need to do to get started?
Received some great ideas about this long stretch here.

We have indeed used it as a cricket pitch and expect to have many more backyard games of cricket here. One of R's little friends suggested a swimming pool. And the mother of that friend suggested a lap pool. Both very good ideas but I don't think the owners of the house will come at that! So it will remain a cricket pitch/general running around and playing sort of space - and since winter arrived and the rain started, it has been greening up nicely. I am toying with the idea of a passionfruit vine or two along the fence and maybe a fruit tree or two tucked into a corner but these ideas are a long way down the track. And we may well be getting a friend's surplus-to-requirements swing set which will go somewhere along here too.
The more pressing issue is this patch.

When I first saw this space I immediately thought of a vegie patch. In the eighteen months since this patch became ours to fill, my ideas have moved from vegie patch to flower bed to a mix of the both, a children's garden with interesting little plants and stepping stones and even, in several moments of I-can't-be-bothered-ness, more brick paving...just do away with the problem altogether!
Well, to cut a long story short, I have decided on a garden of tough flowers, but keeping the little angled section to the left free to maybe do some basic vegies (ie. tomatoes and perhaps lettuce in the summer and spuds in the winter) for the boys to have the vegie growing experience.
As I said, I am no gardener! Well, not yet. And I don't have loads of time to give to the garden. I need plants that I know will thrive on neglect and that are low cost to acquire. But at the bottom line I want some flowers because this patch provides the view from the kitchen window.
So I've decided on rosemary, lavender, daisies and geraniums - and I may add a few other items down the track. A friend's mum is potting up some lavender and rosemary for me. And here is the stash from the nursery.
Yes, that is a marigold in there. I have other plans for that!
And because I love using herbs in my cooking and spend a small fortune on fresh herbs in the supermarket...and because I have all those empty pots to fill...here is the herb stash.

Sage, basil, coriander, thyme, parsley and mint. And rosemary will round that out well.
Stay tuned.