I also make my own using Microsoft Office Word, it's quite simple to do, if you have it. This is how I do mine.
On the page layout tab I first set my orientation to landscape, then on columns I set to three (so I can make a tri-fold), on margins I go down to narrow, so I can fit more writing in.
I do two pages of that. Then put all my info in, On the third column on the first page I put my name, business, contact details etc and in the first two columns I put my price list. Start with the price list though so the info on the third column doesn't keep moving lol.
My second page is just all for my aftercare and other info (which is the inside).
Then print it (it drove me mad the first few times, for some reason I just couldn't print it right, I kept turning the paper upside down?! lol), I print loads of my first pages first then flip my paper and print the second page.
My friend last night asked me where I had them done which was a nice compliment, reminds me actually, I should really print some more out.
Just had a look, you can do it on Microsoft works word processor.
Similar thing, go to file, page setup, set orientation to landscape. Then on format go to columns, again set to three. Go back to page setup and on margins set your top, bottom, left and right to the width you want, then put all your info in.