Cablevision cable can cost Ar$65- $95 monthly for one cable conexion.
Other cables may cost more.
Intenet can cost $90 easily or more monthly (some a little less)
Water, Eletricity, Gas are bimonthly.... I got an Ar $4o electricity bill and $150 GAs...lately
It´s definitely not a good deal... It´s a way of indirectly raising your rent
(by getting you to take over all those costs)
I would recommend being very polite, thanking the person for the offer but saying it would disrupt your budgeting or whatever diplomatic way to say it-- that things are fine as the are or whatever..