Jojo’s Monochird & Biopsy Surgery!

My one year old Mainecoon/Persian mix cat Jojo has been losing drastic weight for the past month. Blood tests have shown to be normal and the vets are unsure what the underlying issue is. He has been dealing with constant gastric issues since a kitten and recent x-rays & ultrasounds have shown suspicious layering of the intestines which needs to be further tested. He also requires an internal castration to help with his hormonal changes and spraying for the past month as well. I have handled solely the costs for the appointments until the news of surgery came up and the vets gave an estimate of RM 700 - 800 for monochird surgery and RM 150 - 200 for intestines biopsy. These surgeries are important to eliminate his chances of cancer by removing an inner testicle and ensuring he doesn't have a genetic disease or some other issue that has led to his drastic loss of appetite (a drop of over 0.5 kgs of weight). Any help with the bills will be very much appreciated as I am a student with a ficed budget and I am financially struggling with the sudden payments. With your help, I can speed up his process of getting into surgeries and find any health problems at an early stage. I have evidences available of recent vet visits and conversations if required. I have attached some images to show on-going treatments. Thank you!