Hello
Several possibilities here.
Let's start with Wills
Have you got Simon's Will of 1860 indexed as Simeon Willson c £100.
The index just says of Dunbrook but it's possible the full thing gives more.There is death duty paid so again there might be more if you order up those records from the government probate website(Will £10) and the National Archives at Kew( I think).
I can't see any earlier Wills for the family unfortunately.
The next thing you might try are records of Longnor.
There is a tithe map and award for the village for 1848 at Staffordshire archives.If you look up Simpn Wilson it should give you the list of land and buildings he owned or tenanted by number and then you check them against the map. BA/15/570 and 199 .You may have to get a researcher to do that for you but it never hurts to ask direct.
There is also a land award for 1785 for enclosing the open fields which may give info Q/Rdc/6
The tithe maps are at Lichfield Record office and the other thing at Stafford.
To confirm the number of Wilson's in the village you could also try the Militia lists of who was eligible to be called up for the army to fight against the French.Or course these wom't give you details on the cottages.
This guy seems to have decided which of the buildings was David's and has a picture.
http://mypastwhispers.blogspot.co.uk/2016/11/the-family-of-david-wilson-1747-1795.htmlYou could ask him for more info.
It seems a Thomas Salt a butcher and chapman of Duns brook died in 2.6.1818 and left a Will.
So there were two cottages.His Will will be at Chester for some reason but again he may just say Dunbrook.
Your best bet would be the tithe records.
They will be at Lichfield or I believe the Genealogist website has tithe maps but I've never had a sub for them.
(Apparently the tithe map and award is also at the National archives £8.25 plus photocopying fees but they may be a little quicker than Lichfield and cheaper than getting a researcher to do it.But then again some kind soul may be going to either and do it for free).
Ciderdrinker