Commercial Rental Pricing

[Account Closed]

Hello I am a new investor I purchased my first property 2 weeks ago. The upstairs unit is an apartment which is rented out and downstairs is a commercial lot. However when I reached out to the tenants the downstairs tenant decided to break the lease and wants out. My question is how do you know what is a fare rate to rent a commercial lot? Especially during theses times with the covid-19. Also with everything going on I'm worried about them just walking away and not paying 2 months rent which is owed since they are breaking the lease. Looking for some advice.

Thanks