For purposes of this section, value is determined as of the date of the last transaction or contact concerning the property, except that in the case of a money order, value is determined as of the date the property is presumed abandoned under Section 72.102(c).

He started using the property for a VERY HEAVY INDUSTRIAL purpose. 

The purpose of such plans is simply to expand the investment choices beyond conventional financial products and into asset classes such as real estate, private mortgages, stock of privately held companies, virtual currencies, etc. 

What is good for certain legal protection doesn't help for financial purposes.

Participant loans from the Solo 401k can be used for any purpose, but other plan assets must follow the prohibited transaction rules.

If you purchase two separately platted houses, they will each have their own mortgage, but a bank might do a single note, cross-collateralizing both properties, but that would be odd and not serve any purpose I can see, absent more details.   

Reasons To Oppose: It increases the number of weeks and months rental property owners must provide rent-free housing to rent-defaulting tenants It frustrates the purpose of the summary UD process It protects lease-breaching tenants at the expense of all others If you live, work, own or manage property in Los Angeles and/or Long Beach areas, please call your Assembly Member as soon as possible and ask him or her to VOTE NO on AB 2343 (Chiu).

What can I do in reference to a tenant who’s leaving soon, purposely running the water to run the bill up?

After all, you’re investing to make money, so any calculations that can analyze financial performance will work for residential properties as well as commercial for your purposes; they just won’t hold as much significance from an appraisal or lending perspective, or for the purpose of projecting appreciation.

The general idea there is the more public you make the offer the more the security definition should apply as the definition is present to protect the public.One of the ideas that stems from the ideas around notes being exempt or not is:"If the seller’s purpose is to raise money for the general use of a business enterprise or to finance substantial investments and the buyer is interested primarily in the profit the note is expected to generate, the instrument is likely to be a ‘security."