Is it Leasing, Property Management, Vendor Management, Operations, Finance, Accounting... 

Investing in NNN lease (Walgreens, Dollar General, etc are your tenants) is also fairly passive, but you maintain a bit more control. 

We're now up to $1,900/mo and the current tenant wanted to sign a full year lease so it's a furnished long term rental for the moment.

We used the lease option strategy so we would buy properties under market value and we would keep them for only around 3-5 years and then we would sell them and trade them up for more properties with the equity that was created.

We work with lots of clients from both coasts, but especially from CA, helping them find investment properties with residents in place under 2 year leases from day 1!

I helped an investor get into a 3 bed 2 bath , 3 bed 2 bath duplex for 105k - each side is leased for 1250.  

Leases are signed electronically (esign.com), and I set them up with RentRedi for deposit, cleaning fee, and rent payments.

Their lease is 6 month term with a same rate month to month however, their insurance states the rebuild of their home and fire investigation efforts are going to take 12-18 months. 

As long as you express the key details of tenant information, lease dates, along with any standard information to vacate, and clear language of "non-renewal".

We're also able to evaluate our rates, and keep pace with inflation, on a monthly and quarterly basis because of shorter term leases.