In your question, you stated that when buying in this mobile home park, you will get a title or deed for the land. Typically, most mobile home parks own the land - not you. However, it is possible that you will get a title or deed for the land. I just find this difficult to believe.
Answering your question, mortgage home lenders will be able to give you a loan for the land but you will need to prove in writing (a signed statement from the park itself) that you will receive a title or deed for the land only. Once lenders see this statement from the park management, you should have no problem.
As for the mobile home itself, this is personal property - not real estate. You need a "chattel mortgage" for the mobile home. Ask several banks about "chattel mortgages".