My partner and I have used N1 or a preceding Word Perfect program for more than 30 years. I am not pushing one particular program over another, just saying we found something that has worked for us and haven't changed. My partner is retiring next year and over the winter I will be reviewing other commercial programs just to see what is out there.
From a time standpoint I can type a commercial report in 6 to 8 hours, if I have most of the information pulled together. If I am gathering information such as M&S cost, land sales, comparable sales, income/expense, zoning, taxes, ownership history, flood, wetlands, environmental, etc. then obviously it takes longer. My normal workflow is to have completed all of my field work, then pull all of the needed information together, run some rough numbers for the various approaches, consider H&BU, etc. and then sit down and write the report having the various pieces of information laid out in the order I will need it. Despite having a complete library of all of my previous appraisals contained in the software program I always start with a clean document, even if I appraised the same property previously, and then import whatever information is appropriate. It is amazing how often I look at an old report and think I could have said that better or I have a slightly different perspective.
Disregarding the time involved for the property inspection I probably have between 10 and 20 hours tied up in most (I don't do AMC work) appraisals. Odd ball residential and simple commercial at the lower end and more involved assignments at the upper end.