I have been renting out rooms in Vermont and I find it to be a mixed bag. 

The rest of the properties are safe each in their own independent protected series in their own safe ziplock bag protected. yes this "plenitude of law" I mention is called  hire a lawyer to do legal research for you and give you a legal memo.

A friend told me to hang brown lunch bags up where they wanted to build.

I've said it once and I'll say it many more times, wholesalers are the punching bags on BP and everyone comes in to give their .02 whenever the topic is brought up without knowing a thing about the actual subject. 

For example dust on the fan and the dirty oven. 

Just an FYI if it is a nest in the ground you can go buy Permethrin powder at a farm supply, horse supply store or Tractor supply store for $5-$8 a bottle and just dust the ground.

He should wet the ceiling with water sprayer keeps dust down and loosen popcorns ceiling if not wet you will gouge and damage ceiling

Discarding obvious trash isnt a problem, and if the property left behind isnt worth much, say less than 300...put it in large trash bags, store for the required time then dispose.

I drove a beater, brown bagged my lunch and spent no money for 1 year.

If there is dirt or dust and if the couches are dirty etc.. they do not like that and the home may sit longer.