What is the best data to analyze to determine if a park / market has high demand to fill vacant lots?

Other than looking at housing vacancy, apartment rents, and single family home pricing, is there any other way to check the velocity of sales in a current market?! I am looking at a number of lease up plays and do not know the best way to get a grasp of the market.

other than running a test ad…call around and see what there vacancies are…if they have any

Check average days on the market. Something like this might help, but won’t be specific to mobile homes…