Lots, and with clear statement that lot 2 won't be sold until lot 1 is agreed, which avoids folk expecting a response to offers on just the land before you get interest in the house.
Then go for sealed bids when you have enough interest in the house, and do your maths on all available offers that combine to sell all you want to sell for the highest price. Which may be the highest bidder on both but may be separate bids on house and land. Farmers do it this way for a reason..
When I sell I am planning to lot my land as well as the house/garden and may put the orchard with either of 2 lots or separate as it could go to next door's owners at the time or with house or with the field behind it. And if I end up keeping one field unsold that works for me too as last time I sold land to buy here I wish I'd kept some as a grazing option for time of need and rented to neighbouring farm for tups meantime. Live and learn!