Job insecure, food, medicine, transportation insecure ~ and the first thing they need to give up is rent in times of crisis.  

In my earlier years selling real estate I also sold properties to a few Asian clients in SF who did the same thing handed over a bag of cash to pay for their land which we promptly transported to the title company..

Make sure the parking is adequate for 3 units also, most people around here drive as opposed to public transportation so parking is key. $250k is at the upper end for 3-families in Middletown, have your agent run a report on this and you will see what I am talking about.  

It is close to public transportation and directly next to a rail station.

I'm not familiar with Carlsbad's specifics, but thise numbers don't take into account Big (note the capital B) costs for water and sewer capacity, school, transportation, permitting, and a bevy of other costs.  

Also, is there a chance that the tenants are utilizing public transportation?

Great schools close by, low crime, residential tree lined block with easy access to transportation as well.

There transportation is very well located to feed into U City and or DELCO.

I am a car guy , But I cant see spending $50K on personal transportation , cash or credit .  

Close to transportation, parks, schools, houses of worship, restaurants, and shopping. 1/2 block away from Bergenline Avenue and Bergenline Ave.