You could get a premium version of Arcturus. To where you get early releases. If you're willing to pay per month The General may offer more services.
I know Comet is a great emulator too compared to something like Plus. Not sure if Leon offers any type of services.
You're always going to have stuff to fix in any source. Just make sure your developer is competant enough to patch them.
Honestly, Plus seems to be relatively secure in terms of authentication. Since the sso exploit has been fixed.
Be careful getting someone else to work on your files, many people talk the talk, but when they go to walk the walk they just slowly fail, and waste your time.