I'm really sorry to hear about your horse. It's tough to deal with bad injurys, but with a good surgeon and dedicated aftercare a lot of times horses can pull through!
I have ever heard of sarcoid tumors actually being inside a cut.. They usually just show up on the horse's skin and can be easily lasered or frozen off. Sarcoids are generally uncomplicated to treat and only require a short, non invasive surgery to remove in which the horse stays standing.
I have never heard of a "gold bead technology".. Google pops this up Wound healing - Patent 5661132
I don't mean to lecture you because I know it's tough to be going through this, and I'm sure you've already figured this out. But when a horse first becomes injured the injuries need to be carefully examined to determine whether or not it is a surface wound or if other structures have been damaged. Then we must take care to prevent infection and proud flesh growth from the begining, instead of letting the wound fester and ending up in the situation you are now in.
If you really want to keep your horse alive, then find the best surgeon in your area and get a second opinion. For healing hte tendon A-cell or stem-cell therapy speads healing immensely. Your horse will probably need antibiotics and pressure wrapping until the wound heals (even after surgery). And he will probably have an ugly scar.
Before deciding whether or not you are going to save the horse or not, you need to decide that you are in it for the long haul and are willing to do anything and pay for anything to save his life. It is cruel to put a horse through more pain and surgeries only to decide you don't want to pay for it and put him down. Decide today whether you have the $10,000 to save the horse or not, and then act.
I wish you a lot of good luck! It is really difficult going through a life or death situation with a horse! I have been there more than a few times, and with dedication your horse will pull through.