If the end product is similar to conventional construction, and is compliant with applicable building codes then I think you're good to go.I think you should also consider where you might start. 

I’ve paid for permit applications, clearing trees, survey, design and engineering, and architectural plans.

Personally I think the Suburbs of Philadelphia is a stronger market with less hoops to jump through, strong rental demand, and a great pool of tenant applicants.

Unless you have developed software or paid someone to do it people often do not understand the cost involved.

The tenant pool is definitely cut to a fraction and many applicants you can find all have different lease time frames.

Hence you needing to retain an Architect and have them do due diligence into the feasibility at which part of their services would be checking what is able to be built in compliance with the applicable jurisdictions. 

I have found using our property management software to communicate as a way for it to be saved 3rd party and reliable for legal matters.Forbes article 1-2024

Plus I use Hemlane for applications, background checks, and payments.

.• Have written permission from your Homeowners Association (HOA), if applicable.

I think it is time for me to have a property management software of some kind to manage my long-term rental properties going forward.