They do it across the board so all their units have to pay the higher deposit.

Do you agree?  

I tried the "fix it" option on the Stessa site, and it constantly gave me the error that there was a problem with my bank?

Basically, these are lands that technically qualify as Sending sites, but that have issues such that nobody really wants to build there.

Either way it would be a grey area, selling a house with a different amount of units/bedroom/bathroom seems extreme though. its an auction site, I have seen auction sites miss the fact there was additional lots in a sale.

OpportunitiesAffordability: Compared to many West Coast markets, Albuquerque properties often come at a more affordable price point, making it possible for investors to get started without a massive initial capital.Rental Demand: Due to the presence of UNM and other educational institutions, there's a consistent demand for rental properties, especially those close to campuses.Cultural Appeal: With its rich Native American and Hispanic heritage, Albuquerque offers cultural festivals, markets, and historical sites.

I'm new here to the BiggerPockets site.

What kind of work did the plumbers need to do.

I am no expert and just do what I am told.  

For these reasons i am confident you do not need an account per unit as having that requirement would be crazy complicated (the opposite if kiss).in addition, how will anyone know that you are not following the law?