Otto,
you're the third consumer to ask about manufactured homes in the past day or so! I am a REALTOR in Florida, so obviously, I do not service TN. I am responding because you specifically mentioned manufactured homes in your question. Many of the rural areas I service have many lovely manufactured homes. I'd like you to be aware of and consider the possible long term financial/investment aspects of purchasing a mobile/manufactured/modular home:

1. A "trailer/RV" has wheels and/or is not permanently attached to the land. It is of no value (no matter how nice)--you are purchasing the land. It is NOT classified as "real property".
2. A "manufactured home" (one attached to a permanent foundation) will depreciate in value, while the land appreciates. How rapidly the depreciation occurs will depend upon the exact property in question. It is usually classified as "real property". This can vary from town to town--it's very specific.
3. A "modular home" (it never had a trailer hitch) will appreciate in value, but not quite as much as a site-built structure, as well as the land (of course). It is classified as "real property".
4. A "site-built" home (even a simple two room cabin) will appreciate along with the land. And naturally, it is also classified as "real property".

The above #s 1-4 are GENERALITIES. Each option has different pros and cons. You may wonder why I've made such a point to note as to how a property is classified: "real property"--or not--is important due to local regulations and zoning, tax and insurance implications, etc. This is just the starting point. You need to find a local REALTOR in Crossville who understands these important issues (it's a pretty specialized field). Get referrals from friends and colleagues who live there. If you need further general information or clarification simply ask another question. I'm sure a TN REALTOR will respond to your post shortly... Best of luck and happy hunting!