[https://www.houzz.com.au/discussions/our-garden-dsvw-vd~3711603[(https://www.houzz.com.au/discussions/our-garden-dsvw-vd~3711603) this is my garden we decked them in pebbles similar to what you want ..found them in bags at a local nursery..they also come in various sizes..

I'm not an expert, but we have renovated a pool and made 1 big mistake. We had similar coping that formed a big hob all the way around (unlike yours). We leveled it out with paving (and then coated the pebblecrete with an epoxy sandstone-look product). The mistake? Part of the yard sloped down to the pool. Every time it rained.....all the sand, dirt and debris from down the side of my house and around the pool went straight into the pool. If we had our time over- we'd leave a small hob around the side of the pool where the land sloped down. Yours looks like it is on the downside of your house with some garden. The hob might be there for a reason.....as we learned.

I am thinking of not buying it now due to the expense of removing the concrete. I am thinking that no matter how nice I make the inside it will be a barrier to selling on. What do you think? I cannot afford to do anymore than stage it with pot plants and an outdoor setting, fire-pit or bar-b-q and gazebo (something like Vy suggested). I need my money (what little I have) for the house. Should I back out? The market is very depressed here at the moment and people are getting a lot for their money.I need to stay in the bottom where there is still some movement. There is a shade house to one side that I could paint and put the barbecue in.

I believe the look you're after was a traditional flooring in French country gardens and suggest a similar effect could be acheived using the same method as for exposed aggregate paths and driveways ie the stones are mixed into concrete and spread out to create the floor (including drainage) that you need and then, before the concrete is properly dry the surface is rubbed with a stiff broom to expose the top of the stones and then sealed..Depending on how wide and thick you need the area of flooring a concretor could do this for you, or in a small area with solid existing concrete floor you could try sticking the stones down very closely together with a suitable tile glue, add a thick cement grout (to help hold the stones in place) and brush to reveal more of the stones to suit and seal.. check out "exposed aggregate paths" for specifics