The only additions to the cost basis of land would be improvements to the land itself (e.g. grading, roads, fencing, fill, 'permanent' structures, etc.).
The only direct expenses for land that come to mind would be property taxes and maintenance (e.g. mowing, weed control). Both of these costs are expensed in the year incurred.
Indirect expenses (e.g. administration, advertising, office, travel, etc.) are also expensed in the year incurred
