I have a dog, have lost dogs in the past, and understand how sad it is. But man, there are so many dogs in shelters getting killed because of overcrowding that it boggles my mind that people can be so selfishly fixated on their needs that they don't think about the costs of their decisions (suffering of the surrogate dogs, the clones that don't make it, and the disgustingly high monetary costs here).

Life is full of death and sadness, people and animals you care deeply about don't live forever. Being able to deal with grief and continue living your life is an important skill to develop. I'm not sure that grasping to maintain what is ultimately unmaintainable is a healthy way of handling it. The clone won't be the same dog, if anything it's going to make it harder to grieve and move on with your life.