I often look for work-arounds when necessary, as in your 'UFT crashes'.
An obvious 'work-around', creating a new Source template from scratch every time you need one instead of duplicating and editing a previouly created source is not satisfactory. Duplicating and editing a Source Template should work but does not for you.
Of all the available default Source Templates, almost none are specific to place, that is, most Source Templates are generic.
You suggest a new template for each, name of county, name of record book. Instead of many Templates, could a generic Court Record Template be less trouble?
Should site specific information be listed in abbreviation one and/or abbreviation two boxes instead in each Template?
Granted, there are two Marriage Templates, Civil and Religious. There are three estate related templates, Probate and Will, recorded and unrecorded.
How about creating generic templates: 'County Court Minute Books', County Court Bond Record Books', or even only one, 'County Court Books' or County Court Records? or, Court Records, to be used with any court, city, county, state, federal?
As to a Court Record Template, the first component might be the court jurisdiction, (county, state, etc.), the second component might be the type of Court Record, and so forth.
Event Template (Advanced Edit Mode) names may be of help: Court-civil, Court-criminal, deed, divorce decree, election, guardianship, and other choices.
Which really puts us right back to defining the Source of the information for the Event.
Are some of your Sources directly from the Courthouse Books and others from published Courthouse books?
Should we differentiate between the two types, original Courthouse Records we have read and published books of Courthouse Records we have read?