I haven't yet been able to reach Jim Adams who manages the
apartment building in which Margrit rented. Chicos telephoned
and wanted to replace the AC compressor for $450. I demurred,
explaining that the air conditioning system was not what kept
the blower from putting out heat; so they said they'd look again
and call me back. 

Meanwhile Mommy and I have concluded that:

1) Only one of us, either you or Mommy and I should go to Detroit.

2) You should go only if you very much want to have the experience
of seeing Margrit's apartment, otherwise Mommy and I should go.

If Mommy and I go, we would probably leave, always depending on
the weather, by the end of this week or early next week.

At your convenience, please e-mail me your travel schedule.

At your convenience, please let me know what you think. 
There's no hurry.