I seriously can't find any video of anyone doing an open world raid multiboxing, like raiding stormwind with their multiboxers.
I also can't find any vids of anyone with a lot of chars (exept one with 37 but he was leveling).
I would love to see someone with 25 chars (or something) raiding stormwind

Is it hard because repairing costs so much?

I really want to get 25 accounts, all the way up to 100 accounts on 15 machines or something like that.

I really find raiding in a huge group exciting.
I don't want to multibox just to go through instances, and kill bosses and such. I don't really care for the best items, armor, weapons etc.

Does no one like raiding stormwind and such?
Like if someone is recruiting for a raid to stormwind, do you not just want to bring your 10 chars?
If someone is recruiting I really want to bring my 100 (if I had them).

Doing something extreme like 100 chars seems exciting to me. Of course not everyone can afford it though.

Edit: And yeah having 5 chars and making them epic doesn't really seem fun to me. Although I'm sure its very fun, and I know 5 chars controlled by a multihunter can often be very powerful.