the house Beside me was Foreclosed. The bank Hired a Maintenance person
to keep the Grass mowed, I simply struck up a friendly conversation with him & within
minutes got a "I don't care, Go for it "
Just remember Banks have Board members & meetings & insurance,
and all types of Paranoid people that think their profit may drop a %
if you sue them over a twisted ankle,
which would put them all on the streets living in cardboard boxes
so Expect a No from most of, if not all the Banks.
on the other hand a Hired grounds keeper
is probably just happy for the quick conversation
before getting back to work
Of course another plan, even if not advertised, Find foreclosed places not being maintained.
Hire yourself out to mow them,
Then help yourself to detecting spots

after all Your being paid to be there,
and just cleaning up the scrap

just remember in this case, silence about
detecting is golden.
& Nobody said you had to mow the grass & scram.