How to get lat long of address from osm file?

Context: I've already stumbled apon nominatim although I can't use the public version for production and I'm not sure how to maintain a local install effectively.

Edit: For further context I need to be able to make updates to some geocoding data (doesn't have to be osm) have those updates go live withing 5-15min (preferably as little time as possible) and have an api that I can call as much as I want. Nominatim's public api has restrictions on the number/frequency of calls which wont work for me. Same will apply to any other api. Currently my setup is I have an instance of OSRM running on a ec2 server. Thanks to user SimonPoole on another question I figured out how to set up automated updates for the routing service using osmupdate. But OSRM takes lat long and gives a route, I basically need be able to get lat long of a specific street addresses.

Question: I want to be able to have some sort of api / qt plugin that I can pass a street address and get a lat long back, your suggestions would be appreciated?

Edit: Shortly after posting this question I did find a qt osm plugin that uses Nominatim, if anyone with experience using the plugin could tell me how reliable it is? That would be appreciated.