Just get started or focus on the ROI goal?

[Amity Word]

IN YOUR EXPERT OPINION, IS JUST GETTING STARTED WITH YOUR PORTFOLIO MORE IMPORTANT THAN MEETING YOUR MINIMAL ROI GOAL IN THE BEGINNING???

I'm a new investor looking to purchase my first investment property as a short-term rental under $300K in Atlanta, Ga.  

My minimum ROI goal is $12,000 ($1,000/month).  

There's a pretty solid 3 bedroom house I can go after and the income potential is approx. $10K annually. But the 3 bedrooms are all a little under my ROI goal.

The income potential on a 4 bedroom house is $15K annually.  

***The BIG QUESTION IS should I focus on meeting the minimum ROI goal or should I focus on just getting started with a solid property even though it's a little under my goal? 

I really want to make the best of my first investment since I would have to come out of pocket for soooo many airbnb expenses. 

Should I stop going after the 3 bedroom and just aim for 4 bedroom homes to meet my ROI goal?  
The issue:

The 3 bedroom home we found has a solid brick foundation, good area, move-in ready, turn-key, and a good way to just get started; but it just doesn't meet the minimum ROI goal.

or 

I can continue my search for a 4 bedroom home, that will meet my ROI goal. I'm worried that I could be spending more money on repairs, and that there's not enough inventory in the Atlanta market for 4 bedrooms that are move-in ready under $300K?