Trust me you will misdiagnose most of what you see. You might get lucky and see things wiggling around but that would only be if you have a high load and prepared the float properly. I'm not trying to be arrogant, it took me years in school and months in field work to learn how to diagnose. It's still cheaper to just have a vet do it because as I said, you can't get medication without a prescription which means a vet visit which means a float anyway because he or she will still have to diagnose the right parasite to use the right treatment or whether or not to do it at all. Some parasites are not harmful to hosts and not treated.

So again, not trying to discourage you but unless you have training, you aren't going to know what you are looking at and will still need a vet to treat so that $60 cost is still going to happen even if you get lucky and see a flagellate waving their flagella at you.