Is there a digital door lock whose code you can change remotely, without a monthly fee? 

I can't communicate with it, change codes or even see the codes.

Also check for back property taxes, code violations (which may not be wiped out by the auction), etc

We also had some exposed wires under the house that required some minor electric upgrades to bring to code.

This, however, changes not only from county to county but also by neighborhood, zip code, school district, etc.Another change we are witnessing in real-time is increased seller’s concessions, which can go towards financing closing costs or buying down the interest rate.

I had to go through "Contact us" to get the promo code to discount the book.

@Femi AjayiRecommend you do your own research on this and visit the places you consider investingThere are 41,704 zip codes across country and no idea how many on east coastRegarding cash flow and appreciation - they do not go hand in hand.

They likely have plaster walls, nothing conforming to current code of course, but not illegal either, and rough basements.

See the below screenshot.If the zoning allows a 3-family, you would need to meet all the rules and regulations in the Building Code as well as the Zoning Ordinances.

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