I need to get one of those huge lenses

I might need to get one of those enormous telephoto lenses, maybe at least 600mm, so that I can start filming the objects I see over my land! This morning, I noticed what appeared to be a satellite except that the sun was pretty high in the sky; this wasn't an Iridium, because it lasted much longer than any Iridium reflection ever does. It was about at least 35,000 feet up, and white and didn't seem to have wings; also, it didn't seem to make any sound, also it flew next to a passing jet that was also about 35,000 feet high. Sigh...it's going to take me weeks if not months to earn enough for a lens like that, not to mention having a very stable tripod and perhaps even a heavy camera that won't vibrate easily!