Which Land Pride model are you looking at? I'd recommend the slip clutch over the shear pin, especially if you're in new ground.
I did not write down the model number. They had a 48", 58" and a 72" that was chain driven. Sales guy tried to tell me my little 30hp / 25 PTO_HP tractor would run the 72" ..and since it is chain drive it would not be to much more than the 58" gear drive. And since it's just 540 PTO speed it's easier for my tractor to turn. So HP would not be a big factor.
I don't want the 72" ...don't need that big of a tiller and don't want to have to store one that size.
I might do a few folks gardens but mainly it will be used for our private gardens. So this will not see heavy use.
Thanks guys!!!!!