@Steve K. I actually have these conversations with my wife all the time, and HER risk tolerance is far lower than mine. She wants everything paid off, while I want to expand at a moderate rate. It all comes down to risk. "Risk" is not inherently good, or bad. High risk just means that there can be a very large "swing" - basically a large variation in outcomes. Low risk means that your outcomes are more predictable, not wholly predictable, just more so. An example of extremely high risk would be something like betting on a number at the roulette table, you might lose your money but you also might hit a pretty big return (typically 35x your bet). If you bet $100, that's basically a range of -$100 to $3500, hence "high risk", a less risky bet (less risk, not low risk) would be betting on black or red giving you a range of -$100 to $100. No risk would be keeping the money in your pocket and walking away because gambling is a pretty bad idea in the first place (I work in casinos, so don't tell my boss I said that).
Strategies like BRRRR are high risk for many people, because frankly... far too many get excited and want to "strike while the iron is hot". They don't maintain enough cash reserves for each property, because it would slow down acquisition... grow Grow GROW! And they're right. If they can keep striking while the iron is hot, they will continue to grow wealth at a fantastic rate. Get rich quick. But if they don't slow down in time, when a large dip in the real estate market happens... some of them won't be able to weather it.
Don't get me wrong, I'm envious of the ones that grow like crazy. Striking when the iron is hot and making a fortune before resting on their laurels. They are a lot braver than I, but hindsight is 20/20. The funny thing about the economy is that.... no one can really predict it. If the economy crashed before they became stable, they would have lost all of it. Prior to the trade war, we were in the midst of a near record-setting decade long bull market. Keep in mind that we are STILL in that bull market, but the trade war has been making it fizzle a bit. The fact that it is very close to record setting means... we're in totally uncharted territory and some people may say "overdue" for a correction. But once again... it could collapse tomorrow, or go on for another decade. People said the real estate markets in Hong Kong and China was unsustainable and in massive bubble territory... about 10 years ago. Some of the people who didn't listen have seen their properties grow 500% or more.
There are people out there that will only do cash outright, they miss a lot of opportunity that way but they have almost zero risk. If the economy collapsed tomorrow, all they need to worry about are insurance, taxes, and maybe some repairs. There are people like Matthew that like to play it very safe, aiming for some leverage but carefully measured. I'm a little more risky, especially now that I'm looking to diversify a little more, but that's because I've "built in" some security first. But that's a key word. Security. Better properties, mean you're less likely to have issues with both the properties and the tenants. Matthew and I belong to the turtles of the real estate world. Slow and steady wins the race.
Then you have the early birds that catch the worm. An early bird that started when I did would probably be in dozens of properties right now, possibly worth double, triple, 10x what mine are worth. Or... the early bird might have gotten unlucky on one of the early acquisitions and ended up 20k in the hole for major foundation issues that somehow got missed, or 5k for a new AC unit. (Did I mention that my one B-/C+ property had the copper coil stolen from the AC unit on the DAY I signed escrow? 4K to replace that one.) One or two really big setbacks early on can break a new investor. A big slide in the economy could break many investors. Or... we could have a record-setting, decade long bull market, and the ones that made it look like geniuses right now. They're in the strike while the iron is hot camp, and they've been the real winners for the past decade. But it could have just as easily gone sideways much sooner.
I'm okay being a turtle. The other guys have been doing great, many have made fortunes, but I don't want or need the kind of stress that operating like that would bring me. Sometimes I'm envious, but it's just not me. What good would an extra million or two do me if I die an extra 10 years earlier because of the ulcers? I'll just turtle along with Matthew, and let those guys make their fortunes. They've certainly been RIGHT this past decade, but that doesn't mean that I've been wrong.