You mentioned not wanting to do the day to day tasks.

If so, is it an expensive task to do?

Keeping a schedule and log of tasks over dozens of apartments takes a consistent effort.  

Longer processing timesPotentially higher competition via larger tenant poolsHigher rentMoving "up market" and avoiding owning high risk propertiesMoving out of the city limitsMoving out of the asset class ENTIRELY (at least in the USA) as the last year was a complete usurpation of private property by the state and given the increasing anti-landlord and anti-property rights sentiment in the USA. 

@Jason H. this is a nearly impossible task for market listed properties in any market that is experiencing growth...in Ohio, Columbus is king with a projected population increase of 50,000 in the next 3-years...Cincinnati is growing marginally, and Cleveland, Toledo, and Dayton are bleeding population...all with net loss.

You have to have persistence and be diligent to keep on task.

So I'm taking on the task to see what I can do.

I completely agreed with the process Daniel suggest on the mechanics on how to accomplish this task.

After running the numbers on dozens of properties, my conclusion is house-hacking in Brooklyn/Queens (or other expensive, major metropolitan cities), seems to be a very tall task. 

Not an easy task in Florida.