There were many challenges that came about after the inspection; from outlets that were not up to code, possible water leaks above the shower head in the ceiling, water pipes from bathroom vanity was the same as kitchen sink with no shutoffs, etc.

.: In CA it is a violation of CSLB business and professions code 7159(d)(5) to execute residential time and materials contracts.

What zoning code could I request a zoning variance or rezoning that would allow us to have the 2 livable units on parcel, one primary residence and one additional living unit (known currently as ADU)?

For those with a W-2, perhaps optimizing 401(k), H.S.A. deductions to potentially get tax benefits.

There is also the International Property Maintenance Code. 

Would either of you be willing to explain cost segregation and benefits of using it as an agent?

Faced with these burdens, many owners choose to limit their renovations to cosmetic work or, worse, proceed without permits to avoid triggering the requirement.This raises a crucial question: which is safer—a fully gutted and renovated building with modern electrical and heating systems, rebuilt to 2025 code but without sprinklers, or a building where the original, outdated wiring and heating systems remain in place because owners chose to avoid triggering costly sprinkler requirements?

https://www.nj.gov/dca/divisions/codes/publications/pdf_lti/...I am at 9 right now 

The inspection report did not mention many of the expensive repairs I'm facing.For one, one of the units cannot even be rented until I spend at least $10k getting the electric up to code, among other repairs, so its been sitting vacant.

The worst part is, during 4+ years of problems, I’ve continuously tried to give them the benefit of the doubt and hoped they would learn from their mistakes.