Not to sound rude, by why havent you been saving for the past month that you knew he had this affliction?
Anyway, simply put there is nothing at the petstore you can use. However, many vet clinics will work with you even if you have minimal funds. Held checks are often accepted, as well as payments, some places will give you information on things such as Care Credit (which is basically a credit card with no interest payment plans for vet bills), some clinics will even allow you to sign a promissary note saying you will pay the total by a given date
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0.1 Bearded dragon (Hannabil)
0.1 mexican Black kingsnake (Morticia)
2.1 Leopard Gecko's (Pogo,Jeffrey Nothing, Louise)
0.0.1 Tokay Gecko
1.0 Blue Tongue Skink
0.0.1 Reverse Okeetee Corn (Autumn)
1.0 Blood Red Corn (Virus)
0.1 Bullmastiff (Asha)
4.1 Cats (Poe, Tucker, Abhid, Felicity, Emmy)