First of all you need to do some research of your area...either by watching and counting at different times of the day to see if the type of client you are wanting to attract comes your way, if they dont...what can you do to attract them...i.e marketing, flyers, word of mouth etc
Is parking easy?
What age groups?
What times are you planning on opening?
What is around the area in the way of your buisness at the mo?
As for the £1600 per month..last year I didnt go for premises as your figure was similar to mine and as a start up wouldnt have been uneconomical for me. I have since found somewhere for less , which is more affordable all round and will give me the financial option of employing someone
Dont forget though, you could try and negotiate with the landlord...and there is the small buisness relief of 50% or buisness rates for your first buisness...
theres many answers to buisness questions if you do a search on here.
xx