Implementig a hot-reload system

[roseicollis]

1) write a plugin for an existing 3d editor [...]

2) buy one of those MIDI mixers [...]

Thanks for your help but...
1) They are 2D as I said, not 3D and I'm not looking for a level editor because there aren't so much elemnts (maybe 10/level maximum only?)
2) buying something is not an option right now (company policy)

But I'll keep that in mind too if someday I do another different project