Please help relief Marley’s pain

Marley is my fur baby of 6 years I have had him from 7weeks old and is another child to me ..

Marley is a American bulldog x kelpie and is 6 years old

Unfortunately he has lost 4 of his front teeth (this is unknown how and why to both myself and our vet) and one back tooth looks like it is dying and he needs X-rays and possibly surgery to remove this.

Vets have said it could be one of 2 things cancer in the jaw with a long technical name or something underlining the jaw line that will need xrays to determine what it is..

He has been in and out of the vets with pain killers and finally a referral has been sent through to the animal dentistry to examine him and these costs are very high I have been given a quote for his dental work of 1500-2000$ with xrays included 😞

My poor baby needs this as he has stopped eating anything semi hard and is only eating dog roll and some times cat food which isn’t good for his nutrition.