This is actually a little bit confusing to me. Do you want to work with models via commands, and thus spawn them server-side? Then you are talking about gameobjects and Noggit has absolutely nothing to do with them.
Otherwise you want to work in map editor (so, Noggit) to make client side map and in that case, commands and server side spawn has nothing to do with that as well. Those are two entirely separated systems.
Anyway, about deleting gameobjects quickly, for 3.3.5a there's great addon called Trinity Admin, but that probably won't work for you. But in general, addon is most likely the only solution. That TCAdmin does is that it adds links to outputs server is giving you after typing commands, you can simply click on those links and another command is sent by addon. You just use macro fro gameobject target, and click on [Delete] next to its GUID. Simple, effective, just needs to have such addon. You can try to actually make yourself one.
