I hear ya Mitch! Reaching a certain age is sobering in a number of ways, the time remaining for listening to music being a major one. So, in preparing for the last relocation of my life, I went through my LPs, of which there were somewhere around 4500-5000. I kept only those I either love or have high expectations of loving (the ones yet unopened and listened to), selling the rest to Rik Frystak, the head of buying at Amoeba Music in L.A. I just set-up my new LP racks (the fantastic IKEA EKET's), filling them with my remaining collection. I don't know how many LP's comprise that (and I'm not about to count them!), but they measure about 416 linear feet. Two thirds Pop, one third Classical.
I did the same with my CD's, getting rid of about maybe 40 per cent of them, whittling my library down to around 5000-6000 (Pop to Classical around 60/40). I do believe CD's actually take up more room than do LP's! My music room's walls will be completely covered with LP's and CD's when done, the corners reserved for ASC Tube Traps.