By leaf compost do you mean leaf mould or compost where the carbon backbone was leaves but with other stuff mixed in?
Manure is tricky these days. I don't bring in any from grazers. The hay industry now commonly uses herbicides (from the pyridine carboxylic acid group) that result in herbicide carryover through to manure...including composted manure. If they fed hay, composted with straw, etc, there is a good chance you'll have growing problems for a few years. So, I'd go for the leaves and supplement from other sources like spent grain from a local brew pub, lots of coffee grounds, carefully selected food wastes, etc.
Long-term, I'd plan on keeping a section for compost you make onsite. Mine goes through bacterial and fungal stages as well as getting processed by worms and black solderfly larvae. The results are far better than I could buy. The backbone of my compost is all the fall leaves collected around my neighborhood. I get eggshells weekly from a local bakery, kombucha wastings and SCOBY from a local kombucha maker, and up until a couple of months ago LOTS of spent coffee grounds. My coffee sources keep drying up so I'm looking for another. We also have kitchen waste that goes in. From time to time...but especially in the fall I trench compost spent brewer grains in all of the crop beds as well as heavy layers in the compost bins. The key is to cover spent grains while they're fresh or it only takes a few days to get gamey. I stop picking up spent grain when I no longer have anything with which to cover it. So, in addition to all the trench composting in beds, I currently run four bins that are roughly 4x4x4 and keep them full. As the compost bins settle, I just keep adding layers. I empty them once a year and I don't bother turning the compost. I get it all distributed in the fall to make room for the onslaught of hundreds of bags of leaves, the grain, eggshells, etc. I have a friend with chickens that really speed up the process for him. I don't have chickens so I rely on the bacteria, fungi, black soldierfly larvae, and worms. It takes the full year and there is still material to break down. I view this as long-term soil building. The soil fauna have responded accordingly.