So with your time at 15 quid an hour your breaking even then...fencing is hard work no matter what you do.
Materials are coming in at the 2k mark. If I add my time on at what my day job pays (£25ph) it would take the total to £3,250 - so still approx. 9 grand cheaper than a Bryce Suma or Vector Powerdrive one. We could have bought in a cheap basic model but wouldn't have the range of movement and no working to the side and they start around 3k for the weight we have fitted.