A dated 1950's house.   Market is strong here, but there could be some 'issues' with the house.

Has a french drain with channels in basement.  Basement has quite a good amount of livable square footage.  The issue is on a very heavy rainstorm (rare, maybe once a year or every 2 years) water will pour over the channels and seep onto various floors, maybe quarter inch puddles or less in different rooms.

There is visible water damage on the baseboard framing and on some of the bottom of the door frames.  There are dehumidifiers in basement and percent humidity normally kept near 65%

Other potential issue is ants seen sometimes in the living room upstairs or porch, not sure if they are carpenter ants.

And then mice issues

So the main question is what to do first ?  Hire an inspector to determine the major problems , and to inspect for mold.

And only then start doing all the other fixups and improvements?

My thinking is if 100 to do list items are spend $$ on and upgraded, only to find out much later a buyer's inspector discovers mold, then all the 100fixups would have been a complete waste of time and $