Additionally, while rates aren't historically bad right now, they are higher than 4-5 years ago, and they will be even higher for you as an investor than they were as an owner occupant, which is what you were when you bought originally.I get that you are anxious to add to your portfolio, but that could be achieved without touching your first golden goose.Sometimes on BP, the push is to leverage every last spare penny, but that can be a risky game as the markets shift. 

If you do call them best case scenario you get the listing, sell their home and end up with some additional buyer clients that did not end up buying this particular house.

But be mindful of the debt service requirements and ensure your rental income is sufficient to cover the loan payments.It’s definitely possible to scale up with DSCR loans—many investors use them to build large rental portfolios.

@Edgar Duarte Selling now under the primary residence exclusion avoids capital gains taxes, allowing you to reinvest the $500K equity in diversified assets like index funds or additional rental properties.

I'll just add that in addition to offsetting future tax liability, I'd like to offset current taxes as well, during my highest earning years. 

If we waited 12 months and got up to 80% occupancy would have netted an additional $500,000.  

Additionally, are there any other factors I should be considering when purchasing a duplex or triplex?

Make sure any lease agreement you use complies with Arizona's landlord-tenant laws, including required disclosures (like bed bug information, for example).If you're unsure, consulting with a local real estate attorney to review the agreement can provide peace of mind and ensure you're fully protected.

Is there a way to access the additional features without creating a new Stessa account through the BiggerPockets link? 

This means there are no checks and balances to ensure all transactions are entered correctly.