Hi Jason,
Several things about your plan jump out at me.
[b]Age: There are a lot of 25 year old MH's that can be bought for less than $23-25K which causes me to wonder if you can truly get this for yours as it sits.
[/b]Your Exit Strategy (AKA, Who is your buyer?): Let's say you move it to the new site. Now you have a 25 year old home on a piece of property. Who is your targeted buyer? Very few (if any) banks are going to touch this meaning this buyer had better be bringing cash to the closing table...And anyone with $75K plus in cash is probably not in the market for an old MH, especially considering $45K or less will buy an absolutely gorgeous single-wide these days. And that new single wide IS financeable.
[b]Hard Money: You may find some family or friend who would help you, but a HM lender is not going to touch this. HM lenders are concerned with loan-to value and will not want to be secured by a depreciated asset that could literally be hauled off in the middle of the night.
[/b]Idea: Your home is likely worth the most it is ever going to be right where it sits. (Unless it's in a hopeless park) That's because it's going to take $4-6K out of your pocket just to move it. And unless you move it to another park you are going to have expensive utility hookups to provide when you get there. So why not rent or sell it where it sits? And before you do, instead of spending $10K why not spend $1500 by cleaning it up, repairing the skirting, putting $100 worth of cheap painted shutters on the exposed side, finding some carpet remnants for the floors, and attacking the interior with a cheap airless paint sprayer and then either: 1) rent it or 2) take a down payment and sell it on terms? Google "Lonnie Dealers" for some ideas on how to do this.
Good Luck!
Ben