The Solo Nationals were not held this year due to Covid , but fortunately the Nebraska Region is still using the site extensively for our Region events. This is a concrete surface since it is part of the Lincoln Municipal airport and very grippy. The reason I am bringing this into play , is even before the A052 became a hot ticket I suggested to some friends and even some folks here that it could be the sleeper 200 TWR tire out there, but I made the comment too early. SCCA banned the tire as having too little tread and then the folks at Yokohama got aggressive like they did a couple of decades back, put more tread into the rubber donut and bingo they came up with the newest competitor in the hot 200 Tread Wear Rated market, which is focused a bit more on auto crossing. I was glad to see Flyhalf state he was running them, but honestly the jury seems to be out a bit on road course use. Our SCCA Region has a ton of National Champions ( auto crossing ) and many have gone to the A052s, and their complaint is they wear quite fast and will overheat with two drivers ---- need to be sprayed down. Not uncommon for some of the other tires running , but something that one should be aware of. I am really hoping we get more road racers to discuss the A052 as tire competition is wonderful for all of us ( it actually keeps prices down with an expensive product). I bring this up as the only guy I knew running the A052s has switched back because he went through a set in one weekend. But this could be the track he runs as I did not ask him about the surface or tire wear. Surprisingly I want the A052 to be another standout besides on the Autocross track where it may have been the new standard ( over the RE71s) had the event run this year, so if you are running them on a road course please contribute and also list the tracks you run.This is super key because considering some of the tracks I run one track will get me 4-5 weekends on the BFG gforce R1Ss I run ( won't be next year since the 315 is apparently being discontinued ) whereas another will barely make two. Surface, age , compostion, speed, design, all effect tire wear and whereas one tire may wear decent at your track , it may disappear like butter at another.
Autobahn , for instance , is pretty easy on tires , and can not comment on Road America at present as have not been there in the last decade -- when I was there it was decent on tires , but Hell on brakes, ha. Blackhawk years back was terrible on tires , but it has been repaved since and not sure on it either. Hopefully folks will drop comments on the tracks they run and especially on the ones you are going to.
This is not to say anyone is right or wrong, just that more information may be needed for you, though I will have to agree that Hoosier is the benchmark, having run R7s for years and only recently switched for a bit more usage and less money with the BFGs. Another option is the Toyo RRs which is the Spec Tire for a lot or classes in NASA, is about the same grip as the BFGs , and seems to be consistent for the long runs, and less money. Your idea to get used Pirellis or Michelins is solid as they will beat everything listed at almost every track I have run, but supply has been down ( until now ) because the racing series were delayed for so long.
Plenty of choices and Tire Rack is a solid link for this site , it helps out the Forum a bit when ordering there, and they will virtually have all your key choices ( and yes you have many ), so keep us posted on your decision and I sent you an email.
PS - if you have run A052s on a road course please contribute your thoughts as Flyhalf has had super luck , but the data is low for track rats ---- it is extensive for autocrossers and it could be the new benchmark.