I began by reading some books from the Gary Keller series (The Millionaire Real Estate Investor, FLIP, HOLD, My First House), as well as Rich Dad, Poor Dad, Think and Grow Rich, and now I'm delighted to find this incredible online resource here at BiggerPockets.com and the awesome weekly Podcast.

Be sure to take a head lamp for cave exploration.  

We give them 120 days notice and let them know that we would be delighted to have them stay on but unfortunately increased costs and market forces are going to require a rental increase of $xxx.xx.

(Then we rehabbed the apartment and put in a delightful tenant that we had had for a couple of years, who also qualified for Section 8, and they now call the apartment their 'forever home'.

If I were living in the units and could withstand the heat or cold, I might not cave and fight it. 

Sure, I could go buy a property near Mammoth Cave for $180k that does 40k/year in gross bookings.

Better even is a 3 bed that can be converted easily to a 2 unit with a studio kitchen as people will take to the culinary delights around them.

@John Clark There is no logic or sense to it, just pure emotions by caving to the tenant advocacy groups.One note on your "increase rents" suggestion.

Note the shoring boards are used to prevent cave ins while trenching.

for some one in Cali, you may not think of things like like tenants moving out in the middle of the night in January turning the heat off,  and opening the windows, Ive seen quite a few properties with busted pipes that look like Ice Caves a few days later, also snow removal ordinances, most municipalities will remove snow for you after 24-48 Hours after a snow fall if you or you tenant dont, it will be charged to your tax bill, at a rate of $200+ dollars per time,  just stuff to think about