They were made by man for one specific task, blind homicidal rage.

It depends on whether or not the PM has any tasks delegated to other team members within the company.

I have experience in performing these kinds of tasks.

To do this, you alternate intense periods of batching similar tasks (recording podcasts, clearing the inbox, writing blog posts, handling accounting, etc.) with extended periods of unplugging.

if you need a free model I believe Adventures in CRE is still gives theirs away for free.  

They cover down on tasks that are outside your current acquired skills sets.  

Something that has really helped me in regards to the tax and accounting tasks is understanding the "why" and the "what" they do.

It is not an easy task to simply raise the rents with the current tenants and some realtors make it seem like an easy task.

Their 10% fee is very specifically related to a few management tasks for your property / units.

You are left with the difficult task of distinguishing reality while managing your fears.