time that you could send out proposals to the landlord agents. Do not put all your eggs in one basket,particularly in a hot market. Ideally you would like to send out a minimum of 2-3 proposals. This enables you to make the property owners contend for your tenancy,but also gives you backups in the event one space gets leased to another tenant.
In case you are renting commercial space by yourself then you will have to write the proposals. Otherwise if working with a commercial agent that represents tenants then they’ll write them on your behalf.