re: *Not a Licensed Surveyor

Try to use it for a boundary survey for legal purposes and any however minor future dispute in court and you’re screwed. Use it for general layout planning purposes is fine, but I wouldn’t build a fence next to your neighbors using that data.

Your friend will need an EDM and RTK GPS, plus research the local court house for legal descriptions showing the witness marks and plats. If you simply want a pretty picture of your property, buy a Sat Image.

Having a RPLS license is not a scam. Have your friend describe his method in engineering terms and achieved accuracy in ppm. Licensed surveyors are no different than any other licensed P.E. and the requirements aren’t learned on the internet using a consumer grade GPS system.