I’m having difficulty making any sense of your post but to use the landlord analogy the situation is pretty much along the lines of:
Tennant (UK): I’m leaving but want to be able to pop back in the evenings to watch the telly and use the kitchen and bathroom.
Landlord (EU): Leave if you like but “Leave means Leave”, no concessions. Tell you what I’ll let you use the washing machine in the shed for a fiver a week,
Tennant: If you don’t agree to my demands I’ll definitely leave andit will be your fault.
Landlord: Got anywhere to stay?
Tennant: No
Landlord: Bye
No, honestly the EU will not come running.
The EU will deal with us exactly as they will any other 3rd nation (except for the issue of the UK border in Ireland). They will stand by member nations above the interests of a soon-to-be non-member nation. If anything watching the fiasco which is Brexit has reduced the appetite of many to consider leaving the EU.