Not sure how much a landscape contractor charges, but what about DIY? For concrete, just hire a concrete contractor (I have a great one if you want his name) and have him pour the slabs and walkways, then you can outline flower beds, etc. and either lay sod or use seed for any grass you might want to plant.
I’ve heard of people paying crazy amounts to landscape designers/architects when they could do it themselves for a tiny fraction of the cost.
