In a period of 2-4 days there is unlikely to be much leakage from decomposition.  

BTW I'm reading other threads about headaches with icemakers, filters, and water leakage problems

But with the dehumidifier and proper earth grading on your exterior, Dry-Lok will buy you more than enough time to sell the house and have it operate trouble-free for a good long time, and perhaps permanently.If you do all that and you still have water leakage, the expense of the interior French drain draining into a bigger sump pit is perfectly justified.

Did you do any testing to see if there was any leakage or contamination?

Visible leakage in kitchen ceiling.

It can occur when roofs or walls start to leak, or there is under-floor leakage.

Flooring looks clean, and we have still not noticed any water leakage.

The MAJOR issues are that the WOOD Framing needs to be repaired under the home, and the Plumbing needs to be updated since there is leakage.

Raised foundation- intermediate floor framing- although there is no active leakage, there is evidence of past moisture damage under the unit with possible sub-floor damage that you may want to have evaluated by a licensed contractor.2.

They did not provide a seller's property disclosure and we just found out we have water meter-pipe leakages and mold issues that we need to remediate as soon as possible.