After reading all the replys to this, simply put, a residential technician is not allowed to install anything into a multi-dwelling unit such as an apartment complex situation. At least for the sub I work for. I personally will not install into a complex type setup, period. Unless I see other dishes already there and EVEN THEN I ask to see WRITTEN landlord permission. Cover my ass. That is considered commerical work for one thing, but mostly as had been already mentioned there A LOT of legal and liability issues when dealing with complexes like that. To the person who said the Sup was just trying to get out of it... maybe... but more probable he was covering his ass as well as the companies ass by doing the right thing. I've gotten into situations exactly like this where the customer has gotten permission from the onsite bullding management, but when the corporation or whoever actually owns the complex is contacted the answer is usually no. And with good reason. If one person gets a dish, then everybody wants one. And they don't want to have to pay to have them removed, holes patched, roofs repaired when a tenant leaves, they don't want cables strung all over hells half acre looking like a tangled spiderweb etc. Usually for us they have to go through our MDU office, they deal with the complex owners and set everything up. They have commercial techs who do nothing but apartments. So it can be done but is has to go through the proper channels. Usually to do it the whole building has to be converted over to DBS, not this piecemeal stuff, one apartment there, one over there etc. Don't be mad at the tech who said he didn't think he could do it, I would have told you the same thing.
As for the roof, there should a roof access point somewhere on the top floor. It's required by law in a building that size if it's 4 or more stories I think.