Hello and welcome, MaLinda and Abby (and Miklos, too!).
The Relion Confirm, also sold at Walmart, is about $15 and uses a very tiny amount of blood to test; test strips run about $35/100. The Prime is less expensive but uses a larger blood sample. Here's a link to some home testing information, to get you started:
http://www.felinediabetes.com/FDMB/threads/hometesting-links-and-tips.287/
What type of insulin was Abby using? We all have little tips and tricks for finding the best prices so we can probably help point you toward a price that, hopefully, you can live with. Having a diabetic kitty is not easy on the budget, I know!
Something you can do right now, if she is not yet on insulin, is to change her diet. A vet explains why wet low carb food is best here:
www.catinfo.org. Friskies pates are the least expensive wet low carb food. Changing from dry to wet brought my cat's levels down 100 points overnight.
This article will also help you a lot! Definitely do read it, then go back through it and click on the highlighted phrase "Cat Food Composition" to see a list of the carb content of most popular cat foods. It's really invaluable. Please, if you do change her diet, do it gradually, so as not to cause digestive upsets, and if she is already back on insulin, you absolutely
must be testing at home to make sure her blood glucose doesn't drop too low and bring on hypoglycemia! Blood glucose can drop considerably if you switch from a higher carb diet to a low carb one.
Don't be afraid to ask questions! Everbody here is always willing to help!


Lucy