That likely was neither luck nor coincidence. Apparently that was you responding to to what you understood to be need that your friends had and because you were their friend and had the means to do so so you did it of the goodness of your heart or could be you did it out of guilt. If you did it out of your heart then me thinks you should let that rest even if later you may have discovered they were taking advantage of you. However, I am not saying they were taking advantage of you. Maybe they had a real need, you were friends, and you decided to help. Maybe God touched your heart to help. Or maybe emotionally you were moved to help. What is wrong with helping someone in need if you have the means to do so and the desire to do so? Right now I know a family whose loved one passed away yesterday and they died in a hospice facility after getting a leg amputation because of diabetes. The man suffered greatly after surgery because his BP got so low and they could not give him the needed pain meds in adequate amounts to ease the pain without lowering his BP to dangerous levels on the high side. I seen it down to around 76 on the high side in a visit to the hospital to see him and try to comfort hm. The family had medical insurance. Medicare and a supplemental policy to take care of what medicare doesn't so the medical bill are paid. As a matter of fact the insurance was paying around $30,000 per month for his weekly dialysis, for many many months. He has had to pay 0.00 cents in medical bills concerning this case. They also had a burial policy but they require him to have it two years before death before they will pay out. They did not quite complete the two years. So the insurance will not pay for burial. The family simply doesn't have the money for the burial. Should they be helped? There are times in life we all need help. There is nothing wrong in my opinion with helping someone with a need if it is in my heart and power to freely do so. I have come across people that needed gas money (so they said). If it is in my heart to help and I can at the moment, I sometimes will offer to go to the gas station and buy them some gas and pay for it. I will sometimes see a homeless person hungry and buy them a meal or bring them some food without them even asking. Life is not always the same for all humans. It is easy to judge and say ...well they just out to get a job and make their own way. I am just not going to do that. I try to use wisdom because there are people who will take another person for a ride so to speak. But if it is truly a need and I can help I ask "why not?" I can't see anything wrong with that.
No dialysis runs $30K/month at a weekly frequency. Not even SPA immunopheresis (antibodies) runs that high in 2025. TLDR the rest... so did you cough up?