If you don’t have experience, you don’t know how to run the numbers on a deal. That takes years to properly understand the numerical computations for a rental, multi, single-family, flip, commercial, etc. Without years of doing it, no one gets what the real return is. That’s why so many people lose money because they grossly undervalue the renovation (for flips) or upkeep (for rental) costs. It is as simple as a good or bad investment because when it comes to your money if it’s not a good investment empirically, it is bad.