I am not sure what you mean by bypassed.All three units were installed the same exact way, used the same exact filter, changed the same time, there is a dramatic difference what they look like after 8 months.The only other difference of course is the temperature settings of individual tenants - some like it cooler than others, but other than that the three units are the same in every which way.When I changed filter every month, when I open the closet door to the air handler, the floor is always black in unit 3, the unit with two dogs. 

Mini Splits are a great option.1) Yes, mini splits heat and cool.2) Mini splits can handle a very wide range of temperature conditions.3-4) Depends on your personal needs.  

I'm new too, but you're way ahead of me, I'm just dipping my toes in and checking out the temperature :). 

This will definitely do well for those two units, but I am curious as to whether or not it will help the heating/temperature on the second flood apartments.

From the investor-buyer end that would be something I would appreciate and most assuredly give repeat business.I hope to find a someone like you when I get into flipping or just in need of a contractor when I buy to hold but the property needs some work.Thank you Daria, I appreciate the feedback... given the dusting of snow on the ground this morning coupled with sub-teen temperatures, someone like me is thinking about moving somewhere like there!

For example, if you have a rental property in a place where temperatures routinely go below freezing in the winter, does your lease include a requirement that the tenant needs to keep the furnace / heat on and at a minimum temperature?

Does anyone use any remote monitoring systems that are really affordable (like a couple bucks/month) that use a cell network and not need a internet connection for tracking temperature of smaller apartment buildings?  

There are time limits when the temperatures are colder.

The only problem I've heard of with replacing a roof in the winter, is the temperatures being too cold for asphalt shingles to seal properly. 

Post closing you can then seek to transfer title to your LLC, but you should subtly take the temperature of your lender on doing so (some don't much care what you do after closing as long as the payments are being made).