There are many people who treat for parasites prophalactically, but I would recommend against it for two reasons:
1 - Different drugs treat different types of parasites. Unless you know precisely what parasites your animal has you won't know if you're using the right drug and thus eliminating the parasites. For example, Panacur (Fenbendazole) is effective against Nematodes, but not Cestodes, Trematodes, Amoebas, etc.
2 - Any drug treatment causes the kidneys and liver to work overtime to purge the drug from the system. Why put your animal through this stress needlessly? Find out what parasites exist and treat only those.
A fecal sample is easy to obtain and almost any vet can examine it for parasites and recommend treatment. This is not cost prohibitive in most places ($7 from my vet in Indiana, $40 from my vet in DC), and if you can afford $100-$300 for an animal plus that much again for a cage, springing for a minor vet fee shouldn't be a hardship.
Once your vet tells you what parasites, if any, you're dealing with, you can order the proper drugs and administer them if the vet treatment is too expensive. This is assuming of course that you have the ability to weigh your animal to the gram and know how to calculate dosages (which you would need to be able to do anyway if you buy the Panacur).
I'd be happy to help you with the last bit (dosages) once you get a fecal exam done.
-Z