Welcome to the forum.
^^Agreed.
Vintage?
As long as the gate valves operate smoothly, a pyramid(s) of doom would be the biggest concern of a holding tank short of leaks.
On electrical, loose connections (wire nuts) merit checks. (If equipped) the generator transfer switch should be inspected periodically.
You should actually be more concerned of water intrusion anywhere, due to mold & wood deterioration issues. Those problems can get more costly in my experience.
A modest fee for an experienced survey could even be a sound investment.
Best wishes.
__________________
J&J
DRV Suites ES-38RSSA #9679
GM Denali 3500HD-Max 4x, CC, 8' DRW
EZGo-txt, Yamaha-G22E
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