The earlier you catch a problem, the more likely you are to avoid extremely severe damage because of that problem. After all, the most severe damage needs a long time to develop.
If you catch your crawl space moisture problem early, it doesn’t give time for mold, mildew and wood rot to develop. In turn, that doesn’t give time for bugs and rodents to show up, and it doesn’t give time for your home’s foundation to suffer irreparable damage.
Essentially, the earlier you call a professional, the better. With the availability of a free inspection from JES, you have nothing to lose and everything to gain.