The agent did input the listing correctly into the MLS... apparently the space rent is not a field that Trulia picks up. The space rent is $655 / month and yes, it is a senior park. I agree with the suggestion that you might want to find an agent in the area... we can set up searches in the MLS with your desired criteria (include or exclude senior park and space rent not to exceed X dollars, etc) and send you listings that more closely match what you are looking for.
Sites like this will never replace a Realtor. We have filters in our MLS searches that can focus on what you are looking for and experience to know if the data is input wrong. As a buyer, you don't pay our fee the seller does and it's predetermined whether you use a buyerâ€™s agent or not.
Save yourself the time and headaches and find a great local agent to assist you.