Unsure if it helps, but instead of asking if the best play is OOS, TK or whatever, ask yourself how much of your life you want to dedicate to managing your assets and what amount of money is worth it to you to delegate that management - then reverse engineer that play. 

I'm a software engineer, looking to get into the real estate space and have been developing a solution to aggregate county records to bring better insights/leads to interested parties.

One is a finance guy, the other a aerospace engineer, both looking in the near $1 million dollar range.

I'm a Junior in college at the University of Michigan studying engineering.

This house is a Jim Walters Home, an engineered kit/shell house that's overbuilt in many ways. 

I would, at least in theory, have several years for my income and/or assets to increase, while the bank would carry zero default risk for at least several years.It's sort of financial engineering, but lots of companies use the exact same strategy with unsecured high interest borrowings.

Your cost to design will be spread over 5 builds, so something like an engineered steel or SIP (structurally insulated panel) method may be more economical than it would be for one-off builds.

However, in Baltimore the building reviewer has told me that the structural engineer of record has to provide the site observation and reports.

I have 13 years experience in residential construction and currently working for an engineering firm dealing with large multi-family buildings.

The precarious saucer home was constructed when an aerospace engineer, Leonard Malin, was gifted the severely sloped plot of land from his father-in-law (see, this is what fathers-in-law gift unwanted sons-in-law).