This is a very detailed document. Thank you for that. I am currently poking my head into beancount, hledger, and the new kid on the block, DIGITS(which aims to take on quickbooks head-on. I love the PTA philosophy, but I worry about catering to the non-tech data entry personnel(bookkeeping), is there a gui for these folks to enter the day to day? Essentially I would love to have the back-end be PTA and GIT for full control, and build/use data-entry front-end<bookkeeping>, and reporting/graphing/dashboards for executives and owners. Perhaps we can even do an OCR workflow ontop of PAPERLESS-NG to stream the bookkeeping into the back-end.