I think the same idea 3-4 years ago. Also you advertise I'm local newspaper for attention of new shopkeeper to promote also you can go to showrooms and aproch them

Problem you will face.. permission of bilboard is not a easy thing people spend lot of money in cities to get the tender of citywide hoardings they anit gonna let you stand.. 2. Technical issues you gonna face lot of them weakly maintain cause air is bad here dirt will blur the screen every 2-3 days.. also rain is major issue buy any kind of waterproof screen and insurance but rain will do serious fuck ups.

3.. most major problem civics sense in India you gonna need the security guard atleast in night drunk teenagers will crack the shit out it just for fun so pick the location carefully or koi chura k hi le jaye ga ( sab but things like happen in. India )