Or Else

[jack]

Are these correct? If not, why? What do they mean?
1. Lucky my employees didn't park here or else I would have to drive upstairs.
2. Lucky my employees didn't park here or else I will have to drive upstairs.

3. Lucky my employees don't park here or else I would have to drive upstairs.
4. Lucky my employees don't park here or else I will have to drive upstairs.

Thanks in advance.

[Casiopea]

Are these correct? If not, why? What do they mean?
1. Lucky my employees didn't park here or else I would have to drive upstairs.
2. Lucky my employees didn't park here or else I will have to drive upstairs.

3. Lucky my employees don't park here or else I would have to drive upstairs.
4. Lucky my employees don't park here or else I will have to drive upstairs.

Thanks in advance.

I think you're missing a subject and a verb. Try,

I am lucky my employees don't park down here on the lower level, otherwise (i.e., if they did park down here) I would have to park on the upper level.