Density altitude changes too much for ONE card to remain valid for variable weather conditions. You might see a few thousand feet difference within a few days, let alone changing seasons.
And of course, if your powder is at all temperature sensitive, you’ll also need another entire set of cards for shifting muzzle velocity.
Changing powder lots? Again, shift in MV.
A person is best suited by a detailed DOPE book, and living in a ballistic app. If a guy really wants to live on paper, then they need to know their MV drift with various temperatures, then print a SET of range cards, changing the DA every 1,000ft or so, for each chosen muzzle velocity.
And my biggest nit to pick with the idea of paying someone for this: it’s 2018, anyone reading this forum has the means to produce their own cards. Hell, if the OP wants a set, I’d be happy to run the calculator myself and email the set of cards for him to print.