One Property sitting on a shared lot Have you dealt with this?

[Account Closed]

I have an offer on a multi family duplex that's been accepted. I just found out that the property is shared by two lots. So there's a total of houses involved. House 1 - 2 bedroom, House 2 duplex, House 3 3 bedrooms. 

The owner of the lot is the same guy that's selling me the duplex. The likely options are a package deal for all three properties.

• Have you dealt with this?  
• What invoved with splitting the lots? Costs - I'd like to quantify his headache which may make him more motivated. 
• What type of headache will I be inherting?  
• This seems like this strenghtens my neogation strength?