Yes definitely get him neutered! Milo is not neutered, and I know that is the reason he is always getting in fights with cats...and he really roams.

Look in the phone book under Vetrinarians and call every vet you find. Just ask them how much it is to neuter a male cat. I called around to find someone to neuter my dog, Nebo, as I don't have much money either. They vary a lot in price. My dog was $55 regularly to neuter (30 lbs at the time) and I know it was cheaper to neuter a cat. Some other vets wanted $85 to do him. Also check and see if there are any spay/neuter programs in your area. We have some mobile spay/neuter clinics that will do it for around $30, and you can get discount coupons on the internet. Check the Humane Society too, they are usually quite reasonable.