I am a realtor, and right now, if you can afford to heat it, stay there. Wait it out. I personally LOVE old homes, and even though it might be a lot of work, its probably built to last. Four acres isn't much, I see your point, but is there a possibility of buying around you eventually? Get the word out to the land owners around you that you want first dib at being able to purchase more acreage. Also, be prepared for a big down payment, on bare land, at least 30-35%. Check into the USDA for land purchase, still down payment, and lots of paper work, but they loan on the appraised value of the land.
Real Estate in central Illinois has slowed down considerably, or at least in the county where I am working, for the first time since the economy has taken a hit. We lost a lot of realtors in the metro-East area, and probably more this new year because of slow sales.
I hope you can hang in there, usually the end results are so worth it, and all you are doing when remodeling is building up equity for the market when it rebounds!!!