Rather he is saying that he uses that calculation as a first quick filter to find properties that are not even worth considering

A less restrictive air filter?

It has to collect water of course but it also has to be an excellent filter.

Then continue filtering out properties that meet your criteria, and when you view results, only the properties that are open to seller financing will appear. 

Maybe, but these are also very old, old houses which will take time and money to maintain.I would stay away from some of those areas and let it breathe for a bit.

Nothing has gone to plan with respect to my rehab in terms of timing, rehab, et al, so I'm glad I don't have a lender breathing down my neck.

That she didn't want to make waves in her new place, but that it was actually the the other tenant "Smokey" causing the odor and that she was worried about her kids breathing it in.  

Monthly landscaping, replace air filters every few months, pest/insect inspections every few months. 

Again you need to confirm all Owners received proper notice of the update and copies of the new documents.As @Bill Brandt mentioned, a sub lease is not a short or long term rental...different documents, different rights.One last note, do not waste your breath talking or phone calling.

Taking a breathe before I take action.