IBC 1000L methane midi - do they smell? how close to the house can you place it?

We have the IBC drum ready, and the cow manure breeding flies by the dozens (we are in a "hot" NZ summer) so we want be collecting manure and starting our methane midi as soon as possible.  

The question is where to put it.  Will it smell and for how far?  On the other hand, how far away can it be put and still pipe gas to the house to burn for cooking?

There might be a thread I can't find that already discusses all this.

Annie