RTI is so easy to program yourself, all these people are making it look like this is rocket science. You should be able to setup everything yourself, the only thing is you should not be eligible to warranty of any kind. You want warranty and support and don't know how to program it - go through authorized dealer and installer.
Past: Pronto 9300 -> 9400 Past: Nevo S70 x 2 with 3 x NC-50 Current: RTI XP-6, XP3, iPad Premium License, 2 x T3X Remotes