Abandoned puppy needs our help!

I found this little man in front of my apartment, and took him to the vet to get checked out. He has no microchip, no collar, and no postings on the missing animal pages. He does, however, have heart worms. He also needs vaccinations, special food to get him back to a healthy weight, and a good neutering. My boyfriend and I are happy to give him a new home, but we cannot afford all the expenses to get him a clean bill of health. He's so sweet and affectionate and we can't imagine euthaniziation or a shelter being an option, but if we don't do something to address his current health problems, we will have no choice. My heart and my wallet is already invested into this pup, but I'm at a brick wall. Please share to help us get the word out!