Insurance shouldn't be too bad, you already have 3 cars on an account, adding a fourth should be less than $50/mo.

Do you have any relatives in the area with extra room to store the '89?

Would your wife want to drive the Cruiser everyday, or does she have a long commute?

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed