I guess you could limit by price, age, location.#2  Attend local meetups. 

Hey Gavin, It sounds like you're incredibly driven at a young age, which is commendable.

This zip code has a high population density with a substantial portion of the population in age groups likely to rent (22 to 34 years and under 18 years), suggesting a steady demand for rental properties.

@Jay Ben, the class rating system is generally subjective.For properties: things like age and amenities drive the rating.  

The insurance company inquired about the age of the roof prior to finalizing coverage.

Do not buy in an area where you'd struggle to sell within a comfortable %age of your bid. 

We do allow a well-trained dog, preferably large, no puppies and no breeds not covered by our insurance (vet records showing breed, age, proof of current vaccination and any required pet license).

From my own experience, I didn't like the ages of a lot of hilltop homes.

(For properties of this age, months requiring some kind of repair seemed as common as months where nothing needed to be done).b.

If your expenses are extremely low, why do you need $1mil in cash flow by age 30?