It is really hard to believe the engine has no compression on any cylinders,But you say it sounds the same with the spark plugs in the engine,to me this would indicate the engine has jumped timing,I don't believe this is a safe head engine,Which means it's bent all of the valves in the heads.Or broken every piston or the rings.this engine or any engine shouldn't have done this.If it has no compression with the plugs in it the engine is done,It will cost way more to fix than the car is worth.Bent valves broken pistons whatever.spinning the engine over by hand is not gonna tell you much.No need in wearing yourself out.You can get a compression tester and check the compression.Or you can do the same thing with your finger.As fire medic suggested ,I believe you've had something happen that the flooding just helped along.Total engine failure.Bent a rod or two mabye.busted piston could have.But the whole engine lost compression.Some kind of timing jump bent every valve in it.If you feel like and want to take the time,I would like to see a video of it rolling over with the plugs in it.If not that's ok too.So very sorry this happend to you.If all is like you say the expense will cost more than getting another car along the same year.I wish you all the luck in the world.Best of luck in finding another.Bless you.Terry.