@Khoi Nguyen guessing you're buying a Class A property? They rarely actually cashflow the first 3-5 years, but appreciation MAY make up for that.
At least 80% of "real estate investors" are really hobbyists.
Why?
They're buying SFR properties at retail prices!
We did that on the first property we bought, then never again.
As an investor you should be patient and look for deals that meet one of the following:
1) You buy below market value
2) You buy with little to nothing down
3) You buy with seller financing
This past December, we bought a package of 4 Class B- properties that met ALL 3 of these!
You also have to make sure you have a clear vision of how an acquisition will make you money and have as many exit strategies as possible.
80%+ of investors hire a Realtor to find them a property. That Realtor solely looks on the MLS.
We've only done one transaction via the MLS (out of 20+) in the last 10 years. Even on that one we got seller financing and low down payment, something our agent was shocked was accepted.