So how do you request theymos for a custom title or do you need a certain kind of trust in the forum in order to request and obtain one? Also do you need to pay a certain amount depending on the title you want? Because I also don't think that everyone can have that kind of privilege here in the forum.
You don't have to necessarily pay(?). You can ask him nicely or give a valid explanation for why you want to have a a custom title. The chances of getting a custom title are more when you're reputable and have contributed to the community. 
I think, reputability and contribution to the community should be on the firs place.P.S. I`m not certain if one need to be a Legendary or at least Hero to leave a reply in this thread, so I tried