Cost is no problem, I just feel It would make me watch more TV and I don't want to go down that road yet.

Willpower!
But if you love tennis it's a must.
I really think I would be unhappy if my Sky went out the window, but my 80+ mum has had it installed and she hates telly. I'm not sure it would have happened if my desire to watch tennis while looking after her, following a fall, hadn't happened. But she doesn't watch more telly, just different stuff.
She thinks, and I agree, that terrestrial TV is useless unless you like all the "....from Hell" or property make over shows etc.
With Sky she gets to watch Cadfael, Morse etc and I get the tennis.
Which makes both of us happy for the short amount of time I'm looking after her.

Perrrfect. (as David Jason used to say)