How do you stay motivated?

[Brad Clarizio]

Recently, my rentals have been kicking my butt. I am up to 11, the highest I've ever owned, and in parallel, my career has gotten busier than ever (I work a full time job where significant travel is involved as well). 

I am having a hard time finding motivation lately. I'm rehabbing two properties (rentals 10 + 11), just took over a house after an eviction that is TRASHED (3k+ in repairs), and had a furnace and A/C go out at another house ($3,200 repair because of the time of year). I'm starting to feel like I'm not making any money (I am) because it's one thing after another. 

I get it- I bring a lot of this on by myself because I self manage and continue to acquire- part of me thinks I need to take a break for a year and get remotivated, but the other part of me thinks that the moment I stop, someone else gets ahead. 

I am 27 years old and want to "retire" at 35, so my goal is 20 SFH's- that will allow me to live a similar lifestyle as I do now, but have the freedom I want.

Reel me in here folks- how do you keep going when it seems like it never ends? 

[Thomas S.]

If making money is not motivation enough nothing will be.

Investing is a job the same as any other. Without the motivation of money there is no reason for anyone to work. If the money is not enough you change jobs.

Enjoying what you do for a living is nice but highly overrated. Time in exchange for money is the true purpose of work.