If this is market research for a business, then only you will be able to work out what to cost at. Go and visit the area that you foreseee your client base coming from, and then analyse what is eing sold for what there. Asking a random person from a random place to give you adivce on what your customer base will accept or not accepot, well the only way i can put it is bad business sense.
New house so new garden, this year is just gonna be spent getting the area sorted out, getting soil nice and fertile, getting a greenhoue built etc. Think this year i'm gonna try and run a good number of potatoes and get a herb garden sorted, then the main grunt come next year. It seem to be about 35m sq to work with. Unfortunately i can only actually get to it at weekends.