Losing money for 20 years and then getting a bunch back at the end doesn't necessarily mean you'll be profitable from a compounded return standpoint, even if you get more back than you lost.

The magic of compounding working against you. 

If you happen to know an attorney with RE experience in this city, I'd appreciate the referral, because I have many questions that need clarification.And I would like to meet with a tax advisor in order to choose the best road to me as an foreign investor.I think I am a good deal analyzer and know how to study the "urban dynamics" to help me find them.I already have a property in Miami that is rented.Thanks in advance to all of you that can give me a hand with this, and my bows for you that are experienced investors, contractors, landlords and advisers in this difficult activity.Yours,Alejandro Riera

The compounding effect of reinvesting your RE income really starts to kick in.

“Compound interest is the eighth wonder of the world.

Spend some time getting to know what things cost.Example: Price out Sheetrock, screws, tape, compound, etc. and that will let you know what that material costs.

Add in lack of experience, and the likelihood of massive problems compound. 

Let me add in a few more pro's in taking out a HELOC to help you make a decision quicker:-If you don't take out a HELOC now and want to later, you're going to regret it when the interest rates are high-Having a large LOC available to you and being ready to jump on a great deal immediately-You can buy your next property without a mortgage, although you will pay interest (but it's simple interest, not compounding) on however much you took out of the LOC-If the numbers work on your next deal you can double down the cashflow, pay off the HELOC completely, and then take out an even BIGGER LOC for a BIGGER property = Exponential Growth.Now, mind you, my risk tolerance is way higher than most people cause I'm partly crazy, but also, relatively young so it really depends on your goals (super cliche, I know haha).

In a number of markets, you can do much better than $100/mo/door leveraged or unleveraged.I agree with @J Scott and I have only been doing it for just about 4 years and it already feels like a different market now than when I first started out, but there are still some good deals out there, just more buyers for them now than "the good old days"For some properties, I am paying 20% more now than I would have 12-18 months ago, but they still generate cash flow.The best thing you can do is use the power of compounding interest in your favor.

So in that case, you would just be paying compounding interest to go further in debt.