Finding tenants in the middle of covid19

From the beginning of covid19 we had a few straggler tenants that where not able to pay rent for a couple of months until now and a few that are still unable to pay and will have to evict. We are still paying our mortgage so I feel that it’s only fare if we evict the ones that are still not paying. Our investment properties are located in Milwaukee, Wisconsin, with about 18 doors. We did have a few that left so we are about 50% vacant and we are not having any luck finding tenants. Is anyone else having this issue?

Any suggestions would be appreciated.

Thank you in advance.