charging for cable

[Tina G]

looking for thoughts on the following:
i have an opportunity to get premium phone/cable service (i.e. all the bells and whistles) for a multi-family rental unit at a promotional rate. it seems that if i split the cost of the normal rate (rate that will be charged after a year) among the units of the property each unit would be paying a low cost for premium cable/phone that i am pretty sure tenants would otherwise not even consider purchasing (because of the outrageous costs). this would be a way to make a few extra bucks a month, and i would offer it as an option rather than build it into the lease (as rent including cable/phone service).

this does raise a few questions/concerns:
- is it legal/"acceptable" to offer "access to" such a service payable to me?
- would it be better to phrase this option as the tenants are being charged for the "use of the pre-installed wiring" in the rental (i installed internet, phone, and tv cables throughout the property in every room to appeal to renters)
- if this is a sensible idea, it goes without saying that i would need an agreement/contract for tenants to sign: what important clauses should i make sure to include?
------ i definitely know that i would want to write something that makes it clear that i am not responsible for providing or maintaining the service itself (i.e. i'm not accountable for loss of service, downtime, or actual issues that come up with cable service providers)

has/does anyone do anything like this? i know the more common way of doing something like this is to include it in the rent, but it would be too late for that right now with current tenants. and the rent for the units is on the higher side as it is, so i think i would jeopardize my rent-ability by raising rent to include the added cost, not to mention i believe it is illegal to require use of particular cable provider if multiple ones are available in the area.

any thoughts would be greatly appreciated!