Hi James
Welcome to the group
The Art Decho patches are not very good to be honest, they will give a rough example but really there are much better options.
The Zoom G3, G3x and G5 can be programmed with the Halls Echo patches (
www.hallsecho.com) and for less than £200 all in you will have a very capable unit.
There is the Hall and Collins Echo (
www.hallandcollins.com) these are £600 and very good
Then there is the TVS3 from Australia (
www.tvsspecialityproducts) this is the unit that Hanks uses these days but are around £3000 plus
EFTP units like the Zoom G2, G7, G9, Alesis Q2, Q20, Quad etc come up some times on ebay at various prices but the EFTP arent supported too well these days.
I did a video a couple of years ago comparing the sound of these units apart from the TVS3 here: