Post is a work of art,jf and geoff I think suggested before about getting someone here to see what suggestions they would make,some of the best advice has been given here ,be no harm to listen to even a 1/4 of it.Any way you could get your €300 back. I could have been bankrupted by experts over the years . I know nothing about milking but I do know telling someone that does not like milking to spend €300K is nonsense.
If someone gave you a €300k yard would you be any happier or richer. Milk away and make a few changes . Load up your father with work to take the nonsense out of him . Start the milking at your times and if the father comes along leave him to it and go off and have a bite to eat and a read of the paper and get the children ready for school . Dry the cows off NOW and minimise your day to four hours for a few weeks. Try a few hobbies in your spare time and put yourself first . Go into a fairly large town and sit in a cafe and look out at the people and think about their day . A lad doing deliveries from a van . What time did he start how easy was it for him to find a loading bay and what time will he finish. Look at other people and think about them and their problems. Small shops hanging in there with multiple stores taking their business. Milking cows might not be the worst job.