I was thinking about an strategy of doing Cash Out Refinicing putting that money in the stock market (distributed in ETF and some "safer" stocks) to get around a 6% anual return (estimating that low because is the "standard" average, however my current stock portafolio has a cummulative return of 66% in the last 4 years).

The last thing you want to do is shop it yourself, have no clue on the bank's closing rate, and guidelines, and pay for an expensive appraisal with no loan. 

Don't shop credit cards and mortgages at once, you ll create havoc for yourself.

High-demand areas with strong economic growth and low vacancy rates are typically safer bets.

Most renters will likely go into downtown one day to shop and have a bite--it's charming, but there isn't enough to do there that you absolutely have to be close. 

Don’t go penny shopping.  

As for the refinance aspect, if you're going from LLC to individual (or vice versa), at my shop you would just transfer title into (or out of) your LLC at the close of escrow, so that part is no biggie.

I would also check rents, do some mystery shopping and see if your expectation is correct.

The better question is which turnkey shops do not do this?

It is much safer to assume the seller has been cutting back on expenses to boost NOI prior to the sale."