Having your fuel injectors cleaned professionally by an auto repair shop costs between $40.00 and $80.00 at most.
I had an auto repair shop remove and clean my fuel injectors professionally for $40.00 which was a pretty good deal and then I've had another shop charge $50.00
Even $50.00 to $80.00 is very reasonable in price for an auto repair shop to remove your fuel injectors, professionally clean the fuel injectors and put them back in.
If you can afford to have your fuel injectors cleaned you can and should because you'll notice an increase in engine performance and improve your gas mileage as well.
I have my fuel injectors professionally cleaned once every 3 to 5 years and during the other times I use some STP fuel injector cleaner to help keep them clean.