Neighbors from Hell...

So I have a house across the street from me that is the eyesore of our neighborhood. Most of the homes in our neighborhood , are nice two bedroom homes built in the 70 and 80's, all well maintained. No kids around mostly one or two people to a house.Accept the house across the street from me. Its owned by A woman in her 50's and her x husband.Neither lives there. I think she has had 4 or 5 kids who range in age from 18- 27. The parents let the kids have the house to do whatever they like. I am sure it's party central. Neighbors are starting to take A hit on their property values. Cops are over there all the time.
The house always looked junky and trashy but was never an issue till they started getting noisy. There always seems to be A new group of bums there, I am assuming she rents rooms to these young people.I did try to talk to them and tell them older folks don't like the noise, but it only made it worse. I did notice the guy I talked to had some pretty rotten teeth, and was assuming the worst ...meth. I started to then realize what I was dealing with.
The house was about ready to be auctioned off for non payment of 5 years of property taxes but the day before the auction the tax deed was redeemed. Now it looks like they are not going anywhere. There is alot of traffic there too.There is no way when people leave there in the middle of the night they are not under the influence of something. I would not be surprised if drug dealing goes on there since there is so much traffic. If I had proof I am sure the police would want to know.
The police in this county deal with issues like this by pretty much harassing the bad element until they move somewhere else. This approach keeps property taxes low as we do not have to pay to incarcerate our scumbags.It works well for us. Any way the police and I are working together to deal with this issue. Just by luck also my girlfriend's brother is a local celebrity as he is A very popular County Commissioner. This in, helps me keep the sheriff's ear.
I would like to monitor this house's traffic by setting up a wifi camera overlooking my property, where just by chance the offending property would be in the background. I would know when people come and go, and if i have reason to i will notify the police.The house is about 70-80 feet away. There is A streetlight on their property so there is some light at night. I would like to just place the camera behind a front bedroom window, but it could be placed outside on my front porch if need be. I do not think i would want to hard wire if it was outside.
Any suggestions for A camera?
With any luck they will cross the line , get their house confiscated for dealing drugs there, and we get peaceful neighbors, who don't want to rob my house.The rest of the neighborhood is ready for them to go too.