Once it's set up, you generally leave it.
Only time you need to update price is if the price of material changes or you've changed printers.
Depending on the complexity of your products too.
Say you sell simple products like posters and they're all set sizes only. A3, A2, A1, A0. and other similar products. You can just export the product data to a CSV file Change the prices and import it back in.
If you have a site like wordpress, you'll have more maintaining to do as plugins and themes have updates etc.
As for the "designers" or "
sign builders" i think they're great.
1. your customers don't need to bother you to design their
sign.
2. your customers what to add or change a phone number. they can easily do that.
3. your customers will probably never follow artwork guidelines, so having a cropbox that will show crop/bleed & safezones are helpfull.
4. everything that comes out from it will be a print ready PDF.