Tivo with lifetime subscription, find them on eBay used they last forever. The new ones are 4k but I use the older ones they record up to 8 channels at a time, mystery to me how they manage that kind of recording on the same hard drive that I have in my computer that struggles to write one stream at a time.
Of course you can buy one new from Tivo, pretty good price right now, what you actually have to pay for is their TV guide service, think that is 3 or 4 hundred now. They also make cable and over the air versions.
Thank you.