Do what you are comfortable with. The last of the plane table and alidade appraisers was still active in 2012. And most surveyors today don't even know what a plane table and alidade is. I do, because as a field geologist I know only did the work but have a plane table and mountain alidade myself. It was a great way to make topo maps or geologic maps. And seismic crews were still using it in the 1970s. Many of the modern survey crews are far more accurate but are not faster in reality, especially if the price points are considered. A surveyor easily has 50k plus a vehicle and probably a trailer and ATV to do their job.
Secondly, the range of "appraisal services" is wide and most of the concerns are from the very narrow format of the secondary market players. The non-secondary market players, especially those outside the bank lending forte are far more flexible and also get to charge a lot more on average since they often are not competing with many other players in the same arena.