MitchHoward hits it right on the head. How much value can you show? As far as what a client is worth, they will tell you. You must ask them what their ideal clients are, what they are worth etc.. They have no issue saying. It is not an issue getting this type of niche to pay you 1-2k per month BUT they won't pay that for maintaining a ranking they will pay it to an advisor that gets them rankings, talks conversions and helps them work through the process of learning exactly what the visitors are worth. Cool thing is once the numbers are down if you make them more than you cost them they have no reason to ever stop.