Your modular is not a real estate listing when not attached to land, but it is personal property that might interest real estate companies as an in house listing. Call a local real estate company and ask them if they take "in house" listings. We have sold several "unattached" mobiles that way in my office. By the way, there is a huge difference between a modular and a manufactured home, so be prepared to answer the question about whether it is really a doublewide trailer.
Email Sherry and tell her Liz from Cape sent you: firstname.lastname@example.org
1. So I'd get the word out to Home Builders--not production guys but those who do custom homes.
2. Craigs List--put it under the "Land" section and run the ad as the temorary home for your dream home!
3. Check with the county for those who have pulled building permits in the county on larger lots and send them a flyer on the modular.
4. Farmer's and those in Agricultural areas are always looking for cheap housing for workers.
Hope this helps!
There are a few people who may want to take this kind of project on. They are usually investors who are in business to make a considerable profit. The modular will have to be nearly free for the house moving investor to shoulder all of the other costs and risks to the project.
Since you have a high appraisal for the property, would you gain more financially by donating the building to a non-profit (example only - not a specific endorsement ) such as Habitat for Humanity. And then possibly taking a charitable deduction for the value on your taxes?
Organizations of that type occasionally have land donated and labor donated, so a project that might not make sense in the private sector might make sense in the non-profit sector.