£2000 investment. 15*12 = 180. 2000 / 180 = 11.1 years to break even. That doesn't take into account inflation so assuming 2% increase each year a little over 10 years. Offer additional services over the fibre, the £15 would cover broadband, add another £15 for voice, so down to 5 years payback time. Stick on TV for another £15, down to around 3 years. Fixed IP, that'll be another £5 a month. So £2000 is nothing. I hope you aren't claiming it is £2000 recurring costs. Companies are supposed to invest, not be granted instant short term profit.