Be prepared to spend a ton of dough.Personally I think that it is unnecessary.

She spend an intensive 2 months studying real estate principles, law, and finance, and studying RV parks in both counties.  

The learning curve for plumbing is a nightmare, you'll spend a lot of trips to the store and get frustrated starting over constantly. 

It seems not the best way to spend money.

I went from growing up in a hut in Vietnam and spending my early years in Section 8 housing in the U.S. to now owning four cash-flowing properties (8 units) across three states.

You will be spending 350-400K for a duplex.

I just can’t imagine how everyday people spend this much money on pipe.I don’t think insurance covers any of the foundation repair, also wonder if insurance will cover any of the sewer line repair work?

A single family could ultimately be a lower price point for you but depending on how much money you have available to spend on the purchase and any repairs/maintenance, either one could work.Have you found any SF or duplexes that catch your eye or know how much money you have to spend?

He spends every waking moment in the field, making sure every seed is placed perfectly.

I would spend the $20,000 and have them spec out the site and also do a cost estimate.