@Tarcizio Goncalves
This subject comes up often at BP; you may benefit from search on the topic. Here's one such thread I was reading recently:
https://www.biggerpockets.com/forums/12/topics/464...
Decide how fast you want to grow your wealth, and are you comfortable with leverage/debt to do it faster?
I learned BRRRR method of acquiring rentals 18 months ago; wish I'd learned it 30 years ago. An ideal rental (not achievable in all markets) can achieve 10% to 20% ROI. If you're comfortable with leverage/debt, it grows your wealth faster than paying off the 4-5% mortgage (i.e. 15 yrs vs 30 yrs). Get inspired by some recent successes:
@Joshua D. , @William Collins and @Austin Fruechting did in 5, 2.5 years and 7 years, respectively, buy using https://www.biggerpockets.com/forums/223/topics/459415-500k-net-worth-in-5-years-im-30-today?page=1
https://www.biggerpockets.com/forums/48/topics/429980-officially-financially-free-at-32----exciting-day
https://www.biggerpockets.com/forums/223/topics/445367-full-time-employee-multiple-brrrr-side-hustle-2875-to-goal
For buy and hold rentals, there is a continuum of perspectives. I know of one widow in Denver who put her life savings into a $225k rental duplex...paid cash, no loan/leverage. Has just one property and is thrilled that it cash flows and there is no mortgage payment. Thrilled that it has doubled in value in 7-8 years (Denver appreciation has been great) and she's averse to debt. She is truly a real estate investor....but on the conservative (not comfortable with debt) end of the continuum.
Others could have taken that same precious capital and invested it in 4 similar properties, with 25% down payments and 75% loans/leverage, and controlled $900k in property that doubled to $1.8M by now. They'd be wealthier, because they used 75% leverage. Admittedly, if a nationwide recession hit, and property values and/or rent dipped 15 or 20%, this person is subject to loosing 15-20% of $900k in properties, rather than the widow's 20% of $225k.
Then, if you use the BRRRRR method, the cash-out refinancing, once you have enough equity (usually through remodeling the property, but sometimes through market appreciation) allows you to ideally grow a portfolio of rentals with 100% financing....and zero of your precious equity left in the property.....I know of a BRRRR investor that turned $80k cash into 30 rental properties worth about $8million ($5million in loans, $3million in his equity) in 5 years....granted, he bought at the bottom of the 2006-08 recession and benefited....but much of it was the buy at a discount and remodel profit.
Then decide if the risk/reward is right for you.
You can say "look what I did with low leverage" (slower)....or "look what I did with maximum leverage" (faster). Good luck!