Dave
Yes to the chain harrow question- most of the time I don't even use the tractor for this, bought my Son a Polaris ATV three years ago and he still hops on it today and drags the paddocks. this year I "HOPE" to lease 20 open acres, bust it up into 4 paddocks, using 1 1/2 white electrical tape and metal fence posts. Movement Depends on how many horses I have at the time, how fast they graze down, average is two weeks each paddock. if I can get a long term lease I will put up a couple of 3 sided sheds. Also they are never totally on grass- I always feed grain.
Ron