OK, I work mostly with residential lots, so that's where my suggestions will focus (at the moment)
I see you have already made categories for small and large residential lots plus non residential lots, I guess they will be defined by size.
I see lots needing the following information given:
Size - this would determine which category it goes into and possibly be shown on the main download page.
Photos - Lots will require more than one picture, maybe one of the front and one for each level (hopefully we can do this better than the way the exchange handles levels)
Description - As you said before, possibly one sentence for the main page, but obviously more detail on the download page. The information should include the following as well as any special inclusions-
-Size of the lot
-Price. This changes with depending on whether you put it on the same size block or a larger block, but you could give a price for when placed on the same sized block.
-Number of bedrooms.
-Number of bathrooms.
-Furnished or not
-If decorated or not (but probably not essential)
I guess you would probably have to state if the lot is occupied or not and if so, give details of occupants.
Have I missed anything?
Norma