Book on Managing Rental Properties: A Proven System for Finding, Screening, and Managing Tenants with Fewer Headaches and Maximum Profits: 3 by Brandon TurnerHow to Invest in Real Estate by Brandon TurnerBook on Rental Property Investing: How to Create Wealth with Intelligent Buy and Hold Real Estate Investing: 2 by Brandon TurnerThe Book on Investing in Real Estate with No (and Low) Money Down: Creative Strategies for Investing in Real Estate Using Other People's Money: 1 by Brandon TurnerThe Intention Journal or 90 Days of Intention: The Real Estate Investor's Daily Journal Imitation Leather – 20Are these are good books to read and worth it to read as good investment?

Would people recommend renting out furnished units or is it better to sell my furniture and then rent it out?

Same as stealing your lawn furniture

I have a 4 plex where random people were dumping furniture and other trash.

 Has anyone had experience with renting furniture for a short term rental?

Do I use the depreciation and amortization report and add “Building+furniture & fixtures” which is our total schedule E depreciation and amortization for current year or is there more to it?

If you have a reasonably flat floor, thicker planks will hold up better over time and better absorb heavy weights of furniture.4.

The tenants would have happily paid to extend the lease, but the insurance company stopped paying for furniture rental too. 

As far as damage inside to furniture and such, is that my responsibility too or is that the tenants? 

Updated all lighting throughout, paint, exterior and interior, cleaned up landscaping, added new sod and landscape lighting stained all decks, window treatments, kitchen hardware, updated furniture and excellent photos.