I could agree with that, though it would be hard to prove that a person knowingly transported an illegal unless he is trafficking humans.

The tenant will have find temporary street parking or pay for storage somewhere.But if it's just an ugly junker that they are using for transportation?

But being in Boston it may be a different market as far as cost are concerned.

The thing the rich want to purchase may be a utility bill, a regular vacation, or transportation (car, Netjets, or whatever), but rather than paying for the thing from current income they first invest in an asset or business and then use that to pay for consumption.

Areas with good school districts, public transportation, and amenities tend to attract reliable tenants. 

I ask this because it does not mention anything about retirement accounts, at least as far as I have read, and if I did put money into a 401K it will take about 4-5 years to save that much with my current living expense, (the largest parts being rent, insurance, and transportation, as mentioned in the book)Thoughts on this would be great.

In boston let me know if I can help

Based on the aerial shots of the property building 2 ADUs may not be easy because of set back requirements and to be honest I know that you don't need off street parking if close to transportation and it is a garage conversion on a single family home.

Though my property is within 2 blocks of the community college, a private university (Simpson) and a school of ministry, plus adjacent to a convenience store, and public transportation. 

Too vague to figure out which property, as there's 150+, but not too squishy where you're wondering if the property is in the good area of the neighborhood, at the edge, close to transport, etc.