how would one allow users to edit transactions only a handful of records on a line level and restrict access of everything else in that line? so if say i have 30 columns on the line level and want the user to edit 3 or 4, what is the simplest solution for this?

There’s no functionality like this through roles management so you’ll have to defer to scripting to disable some of the fields

You could also create a very basic custom form for the roles that you want to restrict access to certain columns and fields.