I’d like to get solar and the Tesla battery setup but power is so cheap here I can’t justify it. electric is REALLY expensive in Hawaii.. and as such there are some great solar plays for Hawaiian residences  if Brandon Turner ever got introduced to those you would see him doing whole pod casts on those incredible programs for those living in Hawaii For me personally if I had to since TESLA is light years ahead of anyone else and my car is grandfathered into FREE supercharging for the life of the vehicle I could just use those as needed and never pay for energy..  

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I'm gonna play "Ken McElroy" here for a minute and opine on high level trends:  the pandemic shook up the nation's population in terms of where people want to live. 

When installed in series, you have the ability for the other valve to come into play and act as a fail safe.  

Their rates are a bit on the high side but you need to plug and play to see how much coverage you really need. 

FTC (Federal Trade Commission) regulates advertising and in the case of rental properties, fair housing complaints could come into play too. 

It would still be a good idea to speak with an attorney and go over your plan to make sure you do it in an efficient and legal manner.You definitely cannot play catch up on the previous years that rent wasn’t raised.

I would ask the neighbor(s) to send you video of the tenant blasting music/making loud noises as well as provide you with any police and/or animal control reports that have been filed. 

Many roles to be played, find out which one you want to play and learn it well.

That will get you the good cash-paying worker family that need this help the most, but you play bank.