Is this going to be expensive?

The short answer is, "It all depends...".

It all depends on the initial condition of your software or website and how much time has to be spent doing what we do.
We'll examine your software or site FREE OF CHARGE and give you a schedule of services and costs for your particular situation. There is NO obligation for this.

We have no problem signing non-disclosure documents and commit to keeping your trade secrets, secret.

It is not true in every instance, but often there is no reason to even come to your door. In many instancees, we can evaluate both software and sites on-line.
You will get an schedule of work and fees in writing, which will not change unless your own paramters change.