Roxy's medical bill

Hello, my name is Jari, im looking to fundraise for my dog Roxy medical treatment. He is 13.5years old male dog, suddenly i found a tumour looking bump, contacted vet and to be sure is it absess,tumour and if it is a tumour then what kind examinations are needed. The examination cost is estimated between 280 -340€ depends how much they have to do, the bump is on his leg and im doing at home what i can, keeping the area clean and so but vet recommended examination as soon as possible. I have had Roxy since he was 3months old pup and he is my only life companion and beloved family member, trying to give him the best last years what he has,all his life he has been really healthy so im trying to do my best to keep him healthy and happy, when i took him i had well paid job and economically i was secured to take care any expenses for him, but after going 4 surgeries myself, including gallbladder removal 5months ago now im without a job and income is barely enough to keep the house up, i thinked i had everything planned and ready for him but then my own health went down when he was 9 and that resulted me loosing my job. I will update his progress on the matter and i want to thank everyone who wishes to help in advance

Update

found also a open wound size of a thumb on his back and loosing fur from that spot also, new problems seems to appear often, not sure how serious it is

Update 2

After first doctor visit, the problem in the back reminds somekind of hotspot even it had some weird skin behaviour around it that will be treated with cortizone liquid to the skin, the ear problem is also with the words of the doctor treated with the same liquid with small doze in a day, now the leg bump issue, it had some weird symptoms so doctor was not totally sure what it is, there is coming out thicker but also thinner puzz and the bump seem to be infected and cannot be examined while on that state it is treated as infection with antibiotics, time will tell more