Many counties have ordinances about noxious weeds and other nuisances. These ordinances have language about over- grown grasses and weeds, as well as prohibitions against storing of junk, etc., on residential property. Some counties also have ordinances defining and controlling abandoned or junk cars. If your local unit of government has any of these codes, it should have inspectors to enforce them. Voluntary inspections should be available at no charge.
Most codes allow for extensions of time, if needed.
If the tenants are responsible to pay any utilities and their usage is the only usage to be billed to that meter, make sure that the billing with the utility company is in the tenant's name. Many landlords get stuck with large bills because they have tried to do tenants a favor and have left utility billings in the landlord's name. If a prospective tenant has been required by the utility to put up a deposit and doesn't have the money, you probably don't want that person as a tenant. Particularly in the winter, many landlords fear that tenants will leave or not pay bills and utilities will be shut off without the landlord's knowledge causing damage such as frozen water pipes. Leaving the utility in your name or having an arrangement with the utility where it automatically reverts into your name when the tenant orders a shut-off is risky since high bills could accumulate in your name before you get your first statement and realize what has happened.