Cost of adding a kitchen and bathroom

[Marzieh Rostami]

I'm looking at buying a property that was used as a church. I want to turn it into a duplex. This is in Houston, TX. It has crawl space so no slab. how much would it cost (ballpark) to put in a small kitchen like 8x10 where there was none. So new plumbing and all. What about adding a full bathroom.

And I am talking about everything prefab and builder grade for a rental.