SI Joint Fusion approved, Funds needed for the procedure

Insurance has approved my Sacral Illiac Joint Fusion!! The doctors said I would be a good candidate for it after getting SIJ cortisone injections every 6 months for the past 8 years. It has taken months to get approved and now that it is, the billing department said I need to $500 down before they will schedule the procedure. Those who know me, know that I am doing my best as a single homeachool mom with disabilities. I need this procedure but it is out of my budget and ability to do without help. This would give me years of Sacral Illiac Joint pain relief. Any amount helps. The first $500 is up front to schedule it and the remaining $500 would be broken up into monthly payments to cover the rest of the out of pocket expenses. It is imperative I get this procedure done as soon as possible since my pain care specialists will no longer be "in network" as of July 1st. Its not something I can save up for and do in a few months.