ester
Not slacking multitasking
OP would putting them all on track system work? Then you can leave the middle to look pretty and to be used by the non good doers as required. It will get wet and muddy in winter but at least only the edge gets trashed and only one gateway to stone.
I've either been on clay with good grass growth (not been fertilised in 20 odd years) but risking getting trashed in winter, or chalk with minimal grass growth, low soil depth, no way I could get them not to fertiliser or nothing much would grow. Each very different circumstance has required 2+ acres per horse (and I have good doer, who would be stripped'/tracked or muzzled as required at appropriate times of year but who overall needed just as much total).
I've either been on clay with good grass growth (not been fertilised in 20 odd years) but risking getting trashed in winter, or chalk with minimal grass growth, low soil depth, no way I could get them not to fertiliser or nothing much would grow. Each very different circumstance has required 2+ acres per horse (and I have good doer, who would be stripped'/tracked or muzzled as required at appropriate times of year but who overall needed just as much total).