An account for self employed working from home ?

I am self employed working from home. I am not making a great deal of income compared to the national average but enough to live on and pay the bills. I have been advised many times that an accountant would be a great thing to have. I have always been put off the cost of one because of my relatively modest income. I always file my own self assessment online but it would be reassuring to have a professional help me make the right decisions and perhaps save me more money.

I don't have physical account "books" as such, I key in all my incomes and expenses in office software on my PC as well as keep records of all my receipts etc.

Can anyone tell me roughly what it would cost to employ one to run over everything with my before I submit my online file ? Also, do they have to be local or can it be done remote?

Thanks.