Well, under these circumstances I guess I will not stay in Buenos Aires overnight and will commence my travel onwards to GIG, where I then stay overnight.
Travel schedule would then be:
FTE - AEP; 08:00 - 10:55 on AR1875
AEP - GIG; 13:00 - 16:55 on AR1220
At least, I should not have any problems with checked bags then. Connection may be a bit tight, but there are some later flights on GOL as well, which I theoretically could take and make the travel insurance pay for it.
Guess that's overall better than staying in Buenos Aires or what do you guys think

?