Check with the county regarding how the land is zoned. If it is zoned commercial or recreational you will pay more in property taxes. If it is zoned ag/residential you will pay less. If it has zoning restrictions, you need to know about them especially if you want to have a business.
If you will have customers coming on site, you need to see how the county requires that to be zoned. If it’s not alreayd zoned for that use, what does it take to get it rezoned? Will it be rezoned? I know here you can petition to get your property rezoned but that doesn’t mean it will happen.
Also, for land conservation, our state has passed laws on dividing up property and rezoning it for uses other than ag or recreational so check MO law. Also check on how your state does property tax exemptions, such as homestead and whether zoning the land commercial or having a business on the property will impact that.
Are there building or deed restrictions? Some restrict mobile homes from being placed on the land. Any restrictions on subdividing and selling if you decide to move? How much are taxes currently? What school district is it in (resale often is impacted by school distrcit)? What type of septic system will you have to have installed and how much will that cost? What will the cost be of drilling a well? Any water laws or water usage restrictions you should no about? Land use restrictions? Will there be a cost to establish electric on the premises? What are your options for heating? Check with local propane and fuel companies regarding cost. If it’s in the country I doubt you’ll have natural gas so your choice will be fuel oil, propane, or some sort of wood heater. Do a cost-benefit analysis of how much each type of furnace will cost you and fuel.
If the 30 acres is part of a larger parcel of land-- like a farm-- do you have right of way to access the road? People have been sold the “back 40” and promised it would be “ok” to use the landowners’ road for access, only to later suddenly have no access and no right of way, especially when original owners die and heirs inherit.
Also, do you have to put in a road or give up easement to the county/city for any utilities and/or road maintenance?
You also need to ensure clear title and no liens on the property, no back taxes, etc.