Help me save my best friend

The news from the radiologist wasn't great. Needles needs a pericardial effusion drainage procedure quoted at over 3k as a result of damage to his tissues leftover from the heartworm he had when I rescued him. I went through 7 months and 7k to get him healthy when I first adopted him, but the fluid buildup around his heart is now greatly reducing his quality of life again. I'm asking for help to get this procedure done as soon as possible—if left alone for too long, it is liable to become a much bigger problem. Worst case scenario is cardiac arrest, and I can already see how markedly different his energy levels and exercise tolerance are. I simultaneously found out I'll need to be treating Needles for chronic bronchitis from the same root cause—a routine medication expense I can manage, but it's a lot to take in all at once. Anyone who knows me knows that this dog is my entire world. He and I are inseparable, and at 6 years of age, he should have a long life of adventures in the car, to the grocery store, and on the trails ahead of him. He should have many more years playing with his kitty sister, Pins. Please help me save my best friend.