We understand that the pig is important to you. But the pig is important, in and of itself. And it deserves medical care when it needs it, and it's your responsibility to find a way to provide that. Loving him isn't going to make his foot stop hurting. Treatment will.
And because many, if not most, pigs will need vet treatment at some point in their lives, and vet treatment for pigs can be very expensive, you need to plan how you're going to do that. If you can't afford $10 for coconut oil, what are you going to do if your pig is really sick and needs immediate vet treatment?