Current tenants

[Dennis Regn]

I have a deal in the works where someone is very eager to leave there house willing to  do subject to financing. Only problem is a current tenant will not let us I'm house for a showing and apparently isn't happy about sale of house. Current tenant has  been living in house for 20 years always paying on time.  House needs lots of repairs I'm gonna need the tenant to leave how do I go about getting them quickly so,I can start rehab ASAP. Ps I live in New York which is very pro tenant especially one who has been occupying a residence for 20 years and always paid rent.