@Graydon Manning Great input. My spouse and I recently did something similar. Bought a home with a $1800 mortgage (taxes and insurance included) in Des Moines, WA. However, we live in the 800 sq ft ADU and rent the main home for $1500/month. This allows us to save the money we would be paying on rent, or a mortgage and save for our next investment.
We just put an offer on a duplex in the Sunset area of Renton, and were having the same debate you were posing above. That short-term cash flow would be low, but we could hold for a while and develop a 4 plex on the large lot, as the city of Renton is approving a lot of these in this area. Also, the short term cash flow would be worth it for us because we would live there for the next year and be in a much more central location (cut our commutes in half). However, too many others thought the same thing and an offer that was able to put 50% down was accepted over ours.
It is tough to get an offer accepted right now, especially when you are competing with others who are paying in cash. Sellers don't want to risk your financing falling through if the home is not appraised high enough. This situation has happened to us a few times now. This is leading us to look more into Puyallup and Tacoma areas for investments.
@Lennox Matsinde