Walls is a deathmarch, it's like sculpting something flat!

My wife and I recently purchased a 3 flat in Chicago.

Those residents pay a flat fee based on a few factors (i.e. number of fixtures, square footage, etc.).I assume you did your research on what you could rent this for...As is, I would not pursue this deal unless you are banking on appreciation and being able to increase the rent quickly. 

The flat I’m buying is in Rubí (close to Barcelona), 128k, 3 bedrooms, 1 bath, renting long term for 600-750€.

Also, you don’t have “use a % to avoid net listings”, you can certainly be paid, and offer to the buyer agent, a “flat fee”....has nothing to do with being a net listing.

Landlording can flat wear you out at times. 

Stay away from flat or declining neighbourhoods. 2.

There are good flat cabinet investor friendly companies out there.

Has anyone had success with a flat rate early termination fee in the past?

@Alan J Mowder Don't forget about the middle ground between FSBO and Agent - that being "Flat Fee MLS", where you get the benefits of listing on the MLS (exposure, offer commission to buyer agents, etc) without the big listing fee that comes with a traditional agent.