Frankly,... if the rent is REALLY cheap now,... take it up first,.. and when the rent starts to go up, just break the agreement and let them forfeit the deposits. Thiis is one way.

But calculate in everything-lar,... inclusive of loss of deposits later on to justify the total cost here to rent for this period.

Alternatively, as said by an earlier forummer, yeah,... who knows, yr business could be very good later, then you can surely take-up this space. And the landlord can increase the rental further too, right ?