Will you be doing contour cutting or just regular vinyl and heat transfer material cutting?
I believe these cutters come with software. Flexi is professional level software with several versions to choose from. With what you are doing however, simple software will do the trick.
24" is likely all you really need. You are only restricted by the width so you can do larger letters (23" wide) by 6 or 10 feet tall if you want so with a 24" cutter you can letter out the side of a semi. If you want to do window tint or car wrap then consider a 48" or a 64"+ wide cutter.
I believe these cutters come with software. Flexi is professional level software with several versions to choose from. With what you are doing however, simple software will do the trick.
24" is likely all you really need. You are only restricted by the width so you can do larger letters (23" wide) by 6 or 10 feet tall if you want so with a 24" cutter you can letter out the side of a semi. If you want to do window tint or car wrap then consider a 48" or a 64"+ wide cutter.