I'm a retired real estate broker. I'm familiar with the casino issue in NY coming from Albany. Whether it's a casino, cell phone tower, cemetery, airport or other large structure that is hindering the sale of your home, there is help:
1. Price - you will have to bite your tongue & face reality that you must lower your price at least 10% below comparable homes in your neighborhood. Your goal is to get your home to closing date & if you don't price it well, buyers will negotiate the eyesore of the casino.
2. Appraisal - hire an appraiser to give you a realistic price for your home. Mortgage lenders use appraisers before they commit to a buyer's mortgage approval. So before the buyer pays for their appraisal - pay for your own. After all, you're the seller & you don't want any surprises when the buyer's appriasal comes in below your asking price.
3. Home inspection - You already have the eyesore of the casino. Don't add more surprises from the buyer's home inspection. Be proactive & pay for one yourself. No need to lower the price from the buyer. If the home inspection reveals any problems - step up & fix everything.
4. Clean, paint & declutter - Make sure buyers have plenty of room to walk around. Leave plenty of space between furniture. Clean the yard, paint & plaster any walls that look like they need it.
Hope this helps