The question is mostly a personal financial planning question and it depends on your preference and what balance of risk and access you'd like and would be comfortable with.

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

Was truly one of the best financial decisions of my life. 

Being a responsible person has nothing to do with the financial calculation for rate of return or cash flow. 

Do you want your son to bet the financial outcome of his 20s on this seller's ability to make good choices? 

Learn what each one of these are, and see which makes the most sense to apply to your specific financial plan. $150 cash flow on any rental especially a triplex is dangerzone imo. 1 month of vacancy of 1 unit could destroy a years worth of financial gains.  

We are only selling completed homes with our own in house financing currently at 3.75%, a huge discount from most bank rates.We are a long time property provider for some of the bigger podcasters: Real Estate Guys Radio, Marco Santorelli (Norada), Kathy Fetke (RWN) Jason Hartman ( Empowerd Investor) GRE (Keith Weinhold), Whitecoat Investor Group and more We also work with American Homes for Rent, Invitation Homes, Crescent, Haven Realty (JP Morgan) to name a few on the institutional side We are partially owned as of 2022 by Sumitomom Forestry, which means we have no bank debt and self fund all our building projects.

@Rory DarcyRecommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?

Not sure your situation financially but even your $100,000 HELOC is going to probably run you $12,000 additional each year in expense that you've got to factor in.

Below is some copy & paste info about our methodology:----------------------------------------------------------------------------------------------------------Recommend you first figure out the property Class you want to invest in, THEN figure out the corresponding location to invest in.Property Class will typically dictate the Class of tenant you get, which greatly IMPACTS rental income stability and property maintenance/damage by tenants.If you apply Class A assumptions to a Class B or C purchase, your expectations won’t be met and it may be a financial disaster.If you buy/renovate a property in Class D area to Class A standards, what quality of tenant will you get?