@Peter Padalino I was in the same position after purchasing my first investment. I was low on down payment cash and wasn't sure if I would qualify for another traditional loan.
Then I watched @Brandon Turner's webinar on his BRRRR strategy and have been able to purchase 2 properties so far this year.
Essentially you have to find properties at a discount, purchase with hard money, private money or, of course, cash. Rehab property, rent, refinance and repeat.
Not sure what your market looks like, but inmine I have been able to find properties at a 50-60% discount. My HML lends up to 65% ARV which allows me to cover almost all of my costs without putting a lot of cash into the deal. I rehab and refinance at 75% of ARV with a conventional loan. As long as your properties are cash flowing you shouldn't have a problem refinancing. I have even been able to pull equity out of these properties which will allow me to have more cash on hand to purchased multiple properties at a time.
Hope this helps, good luck.
And thanks @Brandon Turner, that webinar changed my life.