Dragos, many factors to take into consideration.
1)Location - depends on what kinda trade u are in. Of course a location with good human traffic will command a premium compared to some "ulu" places.
2)The Tenancy Agreement(TA) - Most TAs are standard. However, it is advisable to negotiate the terms with the landlord. Clauses and terms can be adjusted accordingly. Most pple sign a 2+1 lease. (2 yrs with a option to renew lease for 1 additional yr at same rate)However, some landlords may consider a 1+1 lease. Many aspects subject to further negotiations.
3)Hidden costs - The rental is just the basic cost. The tenant must take into consideration costs like water, electricity and application of a phone line. Of course renovation costs will be borne by the tenant. Stamp duty fees to legalise the TA will also be borne by the tenant. Licensing fees (dependent on trade) must also be taken into consideration.
4)Meet the landlord - Create a good rapport in the beginning. Things tend to be smooth after that.
So as u can see Dragos, its quite a substantial investment for yr venture. Good luck.