Im Installing a 16ch cctv system in 2 homes across the road from each other the owner that owns both homes    would like to link the 2 system together so he can view both systems on one screen on his laptop via wifi and there is currently a wireless bridge between the homes 
what would be the easiest option with a tight budget in mind  
2 x 16ch standalone dvrs on a network 
have all ip cameras and have a nvr ( but the customer would like to stay cheap) 
have a 32 ch dvr and somehow wirelessly stream one set of the 16 cameras across 
have 2 16 ch standalone dvrs and have 2 16ch network video server 
thanks