It's possible your loan officer had factored this in already, but you will typically need to have a signed rental agreement in order to show that your existing property should not count against your DTI.

Expect to pay $120-170 per square foot since it's an existing structure.

It was restated many times how the model and asset class is very new, existing just a handful of years in a very dynamic market and economy.

I’m looking to get into a single family home with an existing ADU or a duplex. 

There's plenty of opportunity for small multifamily around the metroplex that will generate better returns and fit more neatly into your existing (successful) policies and procedures than seeking riches from afar. 

Tailoring renovations to these demographics can maximize appeal and marketability.Comparative Analysis with Surrounding Zip Codes43613 and 43615: These areas, with higher median incomes, might offer opportunities for higher-end flips but may also face stronger competition and higher property costs.43606 and 43608: While the potential exists, these zip codes may not experience the same level of market appreciation as 43620, which could affect profit margins.Strategic RecommendationsInvestment Focus in 43620Cost-Effective Renovations: Focus on upgrades that enhance fundamental property values, such as kitchen and bathroom remodels and improvements in curb appeal.

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

I would cashout of existing stabilized properties and build in cash  

Post Construction Appraisals that have been received are averaging $377k for this model (a slam dunk) I'm currently considering another new build with them, or potentially one of their existing turnkey properties in other markets.

You have $1.5+ million home and you're paying $2000 property tax a year, probably a paid off mortgage  if you bought in 1970 for example, and can charge market rate rent (multi units are under rent control with existing tenants, generally speaking, but not SFHs so far) Be really careful with whoever gives you numbers on a spreadsheet whether it's a turnkey company, agent etc.