I've helped a few people with considering modular rebuilds in fire areas and there are some modular and manufactured companies that I work with with that have some specialization in the area. - Orbit is one.

There is no special magic sauce to what he is doing.

Each shipment will have a specialized shipment number, by which you can track the location of your mail package in the United States.

Thanks in advance.When you are buying subject to, you need a purchase and sale agreement, special disclosures and a flurry of other knowledge & forms.

Many different markets, many different agents/brokers that specialize in those markets.  

In my city's codes and ordinances it states that one of the common rental property violations is having "over four unrelated individuals residing in a dwelling unit" would the dwelling unit be considered the entire house or just the part contained in the lease (aka the room)?

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

An IRS lien, code violations (weed abatement, grass cutting, boarding windows-doors, and demolition costs), HOA fees, water- sewer bills all go along with the property providing the property has any of these. 

I'm not opposed to this program but am somewhat confused by all the somewhat ridiculous fair housing laws that real estate people have to tiptoe through and then they offer these special deals to only this select group of people?

Agents "sell" a property because prices are going up, not because they have any special skill.