You could get someone with Horticopia to create a customized portfolio for you to show your clients. If you know which plants you want on your list, it would only take some time, ink & paper to create a customized book to share. Once you get one booklet made, you could then take it to an office supply store and have a couple of color copies made. If you use a clear report cover with the bar that holds it all together, the title page should be a nice photo of your work and company name and phone number. The size of the booklet would be determined by the number of plants you would like in it.
thx$595 for the professional XE package, and they are soon to go online with the updates and upgrades. They also have available photo portfolio add-ons that have photos of many more plants, but not additional data. Most of these are varieties of already listed plants with data. I use Horticopia practically everyday, and Pro Landscape weekly. The plant database in Pro Landscape is like a sample version of Horticopia. If you are in the business of selling, installing, growing or maintaining plants, Horticopia will be a huge help.