I'm finally ready to buy my pro membership, but now I realize I don't have the code for a discount that was offered to me several times in the las couple of month.

But what we do is each debit and credit is tracked and coded to the property. 

Check your landlord tenant code. 

It tells you the livability score for each zip code / neighborhood. https://www.areavibes.com/

There, you'll find detailed information on investing—both in general and specifically in Las Vegas.Before I continue, note that the charts only include properties that match the following profile, unless otherwise noted.Type: Single-familyConfiguration: 1,000 SF to 3,000 SF, 2+ bedrooms, 2+ baths, 2+ garage, minimum lot size is 3,000 SF.Price range: $320,000 to $475,000Location: All zip codes marked in green below have one or more of our client’s investment properties.What we are seeing:The chart below is from the MLS and includes ALL property types and price ranges.Rental Market TrendsThe charts below are only relevant to the property profile that we target.Rentals - Median $/SF by MonthRents had another slight drop MoM ($1.18/SF vs $1.19/SF).

Are there certain zip codes to avoid at all costs? 

As far as the tenant owning their own mobile home, look at Alabama Code Sections 35-12A-1 through 35-12A-15, which provides the remedies for selling mobile homes that are abandoned.

Easier ways I do this are using a site like rentometer.com - which is a subscription service that provides market rents by address with comps OR using zillow and/or craigslist to see what rents are in the area/zip code.

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

I read 'The Bankers Code' by George Antone and it drew me to private lending.