Based on what you wrote, I believe you have two primary goals.A dependable passive income that outpaces inflation and you will not outlive.Equity accumulation to enable additional investment property purchases minimizing the total capital required.If these are your goals, I recommend following the process illustrated below.In this post, I will only discuss location selection.

This enabled me to purchase 5 deals over the last 1.5 years.

I am re-starting up my side gig of private swim lessons to add supplemental income.

I wanted to write and post for supplemental income.

Setting up keyword alerts for your area will enable you to be notified whenever someone mentions the keyword you chose.

The closer to Boston, the more you will have to supplement the mortgage out of your W2 income.

I have also only had one problem with noise and my neighbors were quick to let me know.I use an exterior camera system that I can tell if there is more people than what is allowed.I imagine there may be a wifi enabled sound meter/device that can alert you if sound is over a certain dB level, but have never had the need to look into this.I also get a copy of the renters drivers license so I know who I am renting to.I also have a minimum age requirement that helps weed out a younger group that might be more inclined to be single and throwing noisy parties.

Two huge points you are not mentioning: the up-to-$50k loan that can be taken from the SD401k for any purpose, and the fact that the SDIRA requires an LLC to enable checkbook control (which is the only way I'd invest due to convenience, speed, and lower custodial costs), whereas the SD401k does not need an LLC.

If rents don't keep up with inflation, your financial independence will be short-lived.Persistent: Your rental income will last a long time, ensuring that you do not outlive your income.Reliable: You can depend on a steady stream of income each month, even during tough economic times.I will cover each of these three requirements necessary for lifelong financial freedom.Rents Outpace InflationIn real estate, prices and rents are determined by the imbalance between the number of buyers and sellers.When there are more sellers than buyers, prices decline until there is a rough balance between the number of buyers and sellers.When the number of buyers roughly equals the number of sellers, prices are static or increase at a slow rate.When the number of buyers greatly exceeds the number of sellers, prices increase rapidly.Rents follow prices.Higher prices reduce the number of people who can purchase, increasing demand for rental properties and increasing rents.Lower prices enable more people to purchase, decreasing demand for rental properties and decreasing rents.The only market condition where prices (and rents) keep pace with inflation is one where buyers greatly exceeds the number of sellers.

Obviously my career has enabled me to purchase some real estate on the side.