Yeah - I did the same after they cancelled our original hostel. Looked like I'd booked for eight people in two bunks. But I kept looking / refreshing and found a decentish hotel that would accommodate all of us. Its the other side of the river but the Uber estimate for a cab to the centre or the stadium was 110 UAH (£3) and about 15 minutes.
Just got to keep our fingers crossed that they don't cancel on us as well.
The Liverpool to Warsaw return flights for our trip are still available for £378 (we paid £70). The sleeper trains have now sold out but there are routes from Warsaw still (that coach innovations return for £159 being one option). So you could still do it too and from Liverpool for £537 - which isn't exactly cheap - but it sure beats £1000 day trips
Yeah, I suspect there are still routes that can be found. Problem with some of them is time as well, and whether you have that, as much as the finances.
I did look after the second leg in Rome for a mate and at that point you could have got to Kiev and back, Thurs to Mon, for £160. That was return flight to Warsaw and an overnight bus from Warsaw to Kiev on Thurs night and back Sun night, so you only then needed a room Fri and Sat. Don't get me wrong it would have been a gruelling trip, like, but as you say, for a serious saving, probably well worth it. Not sure if that option is still there now though.