What is the cost of re-plumbing in Florida ?

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Second plumbing leak came in this week after a tenant reported seeing water puddling on the vinyl plank floors. A plumber today mentioned that the water meter is moving while no water is in use in the house so we are under the assumption the leak is coming from the in-line. The house is a 70's house, block on concrete slab. Old galvanized piping is probably running in the slab and it's starting to rot. Last time the leak was at the back of the house so we broke the concrete, replaced the crumbling pipe and put new blocks in, this time I'm looking to get away from the current piping and have PVC or whatever is available done. 

The house is a 3/1, shower, toilet and sink are in the back, kitchen is also in the back of the house. Total SQFT around 900.

I'm starting to collect offers from plumbers on Monday. Anyone can estimate the range for a job like this  ?

Thanks and have a wonderful weekend.