Real estate advice please!?

Okay we bought a 3 bedroom 2 bathroom manufactured home on 2 acres of land in January. We bought it with the thought of possibly building a new house on the land one day but things have changed and that will NOT be happening. I want to sell but my boyfriend doesn't. He thinks it will ruin his credit if he sells too soon. When is the soonest you can sell a home after you buy it? I am concerned about selling it soon because it IS a manufactured home and I hear they decrease in value over time. I don't want us to LOSE money. This was a mistake obviously, I am worried. It is a nice home though it even has a fireplace and is better shape than my own mom's house. The location is great also we live only 5 min from a really nice lake. I guess my main concern is I want to be able to sell the place for the same we bought it for and not take a loss. My bf wants to pay it off then sell it so we get the credit and so we can use the profit for a down payment on the next house. I just don't want to pay off a place that might be worth less after its paid off. Idk, maybe I am worrying too much about it. Anyone got any advice? Also can anyone tell me what the hec is a short sale??? thanks! :)