sdr is right. With any kind of hardscape, you’re looking at $10,000 +++. Start with very little grass and more planter area. Maybe a small pond or fountain. That will save a lot money on water over time. Grass consumes a lot of water in So. Cal.
I don’t recommend a lattice patio cover — they are useless. Go with a patio cover with real roofing so your outdoor furniture is protected from the elements. Do a cover that is elevated so it feels more airy. You can still be outside when it’s raining and pets will appreciate the outdoor shelter also.
Stone hardscape will cost a lot more than bare concrete or colored concrete.