Your going to want the 6" coil on the Nox at that site. Otherwise it will feel impossible with that many targets. I would suggest you lower your sensitivity and raise recovery speed to where you can detect at just a few inches at most 3-4" and hunt the ground like that and dig as much as you can tolerate - Then go back over the site with your sens higher and look for deeper targets. Option B would be to notch out or up to only the keepers like 20 and higher and the Nox. I'm no Nox expert but this seems like a logical approach for a site like that assuming you plan to hunt it multiple times. You'll also want your Iron Masking setting dialed in F2/F3. I would also start 50' away from the foundation and work my way inwards so hopefully less trashy further away from the property but still maybe find some relics and coins.
On the Gaia App there is a "Historic Topo 1930 map you can control the contrast of the map about 40% if usually good laid over the current satellite image and see the black/gray image of houses and approx where they used to sit. You can hold on the map to draw measurements if that helps. I included a couple sample pics if that helps.
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