We had a similar issue and hired a professional engineer to come out and evaluate it. This was only $350. Like, you, we had several companies trying to sell us on digging trenches in our floor and then putting in a sump pump, all at tremendous expense. The professional engineer told us all that was very unnecessary. He advised us to simply make it so the downspouts would get the water further away. I did the work myself with some exterior grade pvc piping and viola! No more water coming in at all. I think I did everything for about $100 and my own labor. Most of it took only maybe 4 hours.
We don't know your exact situation but if you have a downspout from your roof drainage over there, then make it so that all that water gets AWAY from your house, at least to the point where the ground will continue to slope away and you'll be set. Fix the root cause, if at all possible, instead of trying to deal with the water that will force it's way in, if allowed to sit against your foundation.