I've raised £4000 to Help save Nero.

Please help me to have the means to help Nero.
A lump was found on his leg and the results came back today that it is a sarcoma (I think that's spelt right).
The next step is to take him for a biopsy, depending on the results of this will depend on how things go from there. The lump has to be removed either way but worst case scenario is that his leg will need to be removed and he may possibly need chemotherapy.
Unfortunately my insurance will not cover the cost of the treatment and I don't have the money up front to pay for it.
The goal is just an estimation based on the conversation with the nurse I had today. If the treatment comes to less I will give anything over the treatment costs to charity. Most likely the RSPCA.
Please help me to give Nero the fighting chance he deserves. He is the sweetest most loving dog and deserves the chance to fight this.
I cannot imagine my life without him in it.