And the code enforcement back even 10 to 15 years ago was non existent. 

One is strictly investment, where the neighborhood/location is not important just the potential for upside and low cost living.

I know you code C++ well enough to create bitcoin. 

By zip code only or zip code + 4 digits?

Under $150, easy to install and use, tenant can set their own code but landlord can retain the master and always have access, tenant can't lock themselves out, standard key for emergency backup, batteries last a couple years, etc.

That is strictly from a scalability stain point.

If you're going to rent the space or sell it as livable space, it will need to meet code.

Also, you should update your NAICS code as well to align with your new name and business focus.

I have searched for this on the forums extensively and online, to the point where I've started building my own and writing the code myself.

These are professionals with additional training and a stricter code of ethics.