Section 8 housing, does this seem wrong?

My husband and I and our 4 children have been on Section 8 and have been renting the same house for over 5 years. Within the last year our landlords have put our place up for sale along with the 147 acres around it. Our HUD inspector purchased 62 of the acres and now has showed up at our house several times knocking on our door unannounced and looking around our house with her husband because they are interested in the house and the other 85 acres.She has gone has far as trying to tell us what to do and leaving notes on my husbands vehicle. Then shes watching our every move trying to say we are lying about our income which is not true. We barely even pay our bills. I am a struggling nursing student in college that struggles with gas money just to get to cl. Do you feel this is right? I feel she is hoping that we will move just so the landlords might lower the price they want just to sell to them. We already have all kinds of people that stop by looking around our place