Hi.I would sugest 5x how many tuners you will feed multiswitch.so you have sky 28e and dvb,t and dab,radio on one cable.And one separate quad,okto(how many rooms?) lnb on another cable for any dvb-s boxes in house.
Skybox dont have diseq switch option for 9x or 17x multiswitches.If freeview you mean dvb-t box then one cable,if skyplus and dvb-t then two cables,if skyplus ,dvb-t and dvb-s box then three cables(two from multiswitch on diplexer and one straight from other dish).for free football on other satellites not much there try 42e for uefa games or 26e for jazzera sports 1,2 for european leagues(i dont know if 7w nilesat strong for uk).