Hi Lynn and extra sweet Washutu and welcome to the FDMB!!
Take a deep breath! Lantus is expensive, but if you shop around, you may be able to find it cheaper, but it's going to be around $200 for a 10ml vial, but 10ml is 1000 units, and most cats dosage is in the vicinity of 1 unit twice a day, so that would last you 500 days!
Actually, while it probably won't last that long, we routinely use it for 5-6 months. If it's cared for carefully and kept in the refrigerator (Not the door, on a shelf IN the refrigerator) it can last every bit of that long.
Your other option is to ask your vet to write you a prescription for the Lantus Solostar Pen. The pens can be used just like a vial (you use regular insulin syringes with it, NOT the pen needles so if you get the pen, don't be bullied into buying the needles for it) They only hold 3ml each, so have 300 units and will still last up to 6 months, so you'd probably be able to use every single drop.
The problem with the pens is that they come in boxes of 5 pens (so 3ml x 5 for a total of 15ml or 1500 units) and not everyone will split a box up and sell you only 1 pen. It's worth calling around though! Some Target stores, Costco pharmacies and hospital pharmacies are the ones I hear of that are most likely to be willing to split a box up.
You can also try getting a
Lantus Savings Card, which IF it works will allow you to buy your first 3 pens for $25 each, or will take $75 off the price of a box of 5. The problem here is that not everyone will take the savings card because some pharmacies require a new registration number that vets can't get, but since the savings card is free, it's worth a try!! You have to sign up as either being over 18 or the caretaker of a child, not a cat though. I've heard several members say that they have gotten them in their cat's first name and their surname though, like "Fluffy Jones", or "Killer Jackson".
The start up costs for treating diabetes are a little steep, but they aren't as bad as you've been told. I'm on SSI as my only income and I've been able to keep China much healthier without breaking the bank too badly.
You're in the right place though to learn everything you need to know about treating diabetes, and we have lots of tips on saving money too! The biggest cost savings I can tell you about is to learn how to test at home! Home testing your cat both keeps him safe as well as saves you the money on trips to the vet for expensive tests you can do at home!
Good luck to you, and keep asking questions. We can help you through this!!