My 2 cents as another (previous) forum moderator....
This place really doesn't need one. Not in regards to one, or a couple, members who may be initiating some negative conversations.
Blocking a member can only do so much, because y'all know you'll see them quoted. If you really wish to see someone disappear, than just do it. Don't reply to their posts, no matter how much it may irk you. That's easier said than done.
Some people like that confrontation.
Some other people like that entertainment.
A moderator could serve other issues here. They could combine multiple threads on the same topic and move posts when needed. (These things drive me a little crazy as a former mod who's a little ocd
They could answer questions about the site from newbies, or even older members.
They could issue warnings when needed too, but that is pretty rare here. From what I've read these 2 racing seasons I've been here, there was only one, maybe 2 previous members, who were problems, and they're not here anymore. Sometimes, things just have to run their course.
And, while not expensive, a moderator would cost a little, unless someone just volunteers for it. And with that, the site and SHR would need to be very, very confident that the moderator represents them the way they want to be. That's likely a bigger burden than the $ they'd pay a mod.