The haddware costs can be mamaged but having wires professionally run will be the most expensive part of the deal. Running wires in a walled house can be a PITA and take some doing and the pros charge avvordingly.
As for sound, unless you really, really insist on it, try keep the front three speakers standalone for better sound, and save the cost of having more wires professionally run. If you must, you can use in-wall or in-ceiling for the surrounds but standalones are better soundwise here as well.
As for what it costs, different areas of the country have different pricing. You might want to get some estimates from some local pros for the costs of running wires, but know where you want the speakers to be and also where the main system will be located. All wires will need to terminate there. Likewise, if you want the sub on a different ewall from the receiver you may need a wires run there, too.
also, while you're at it. will you need HDMI cables run from the receiver to the TV?