Let's see, remove the vapor barriers - cost maybe $500 depending on the size and labor cost in your area.
Or, "monitor" for the rest of the life of the structure at let's say $100 per visit at each change of season for the 30 year mortage for a total of $12,000.

I think I would tell my client to have it fixed, rather than "monitor" no matter the possible additional income stream. JMHO

__________________
Jim Luttrall
Mr. Inspector.net, Inc.
Allen, Texas 75002