The market in the Grand Rapids area has improved drastically over the last year and a half. There is a very low inventory of homes for sale right now. Since land contracts are usually not favored by sellers, this means two things for someone who wants to purchase with a land contract 1) you will have very limited options on what homes you can choose from, and 2) you will not have a good negotiating position.
My question to you is why do you want a land contract? Usually it is because a person cannot qualify for a traditional loan. My advice is do whatever you can to qualify for a traditional loan so you have as many options available as possible. In the meantime, you can have a Realtor search for homes that are willing to consider a land contract. With land contracts, the seller will expect a large down payment, usually a minimum of 10-20% of the purchase price.