I have no problem with you sorting out your home entertainment. Push for the dish on the roof rather than the balcony. You may find that you are given a 'Cock and Bull' story as to why it cannot go on the roof, this is only because it is a lot easier for them to place it on your balcony than the roof. If you tell them the roof or no sale, you will see how quick the dish appears up there.
Go up onto your roof your will find a cupboard housing all the outlets for each apartment, bascially your apartment is being fed from that board what you need to do is 'live' it up, you may find that the dish already serving your apartment supplied by the developer will do the job if realigned, after all a dish is a dish, make sure that you have your viewing card ie sky or freeview.
Flooding the market in Spain is a new design satelitte receiver. These receivers have a built in CAM which is capable of decoding the sky card or a free to view card. The new receivers allow you to access all of the channels including premium channels as long as you insert a viewing card with the relevant subscription package. People who bring their Sky cards from the UK cannot view the premium channels (Sky Sports & Sky Movies) when they insert the card into a different Sky Digi-Box. They receive the message “This is the wrong card for this set top box”. These receivers allow you to insert your existing Sky card from the UK and benefi t from all of the channels that you get at home. There are various makes of these receivers, prices and performance vary accordingly. They are manufactured by independent companies and are not authorized by Sky. There are businesses in the Duquesa area that can do this for you, I have tel nos if you want? Don't know if I am allowed to post them here so PM me and I will pass them on.
So initally you will require a receiver and TV (hopefully your 42" will be ready and waiting for you!), the dish already on the roof with any luck can do the job, bring you card from home...then put your feet up and relax!