Many lawyers work at home, including me. I am a virtual tenant in an executive suite of offices. The receptionist answers my office telephone and forwards calls to me at my private home phone. I have a complete, comfortable home office. I schedule appointments with clients in the executive suite and pay for conference room time as I use it. My mail and packages are delivered to the suite address. Unless I tell them, my clients have no idea that I am not in the office all day.
As for a secretary, I used to have one, but spent more time dictating and reviewing than if I just did everything myself on the computer. But when I need extra help, I can hire it from the operators of my executive suite, which has a color copy machine, fax machines and any other support I might need.
There are any number of attorneys who specialize in medical malpractice issues. You would have to show that the first doctor could have or should have known that the diagnosis was incorrect; this can be tricky, because an incorrect diagnosis - *IF* made in good faith and consistent with the information available at the time - is not malpractice. Which is not to say you couldn't sway a jury anyway; but do you really want to be part of a process which creates mistrust, raises costs for everyone, and benefits only the attorneys?
Assuming the facts support a conclusion of actual malpractice, I'd recommend asking for direct reimbursement of all medical costs to you (and/or your insurer) - do not let your attorney get his paws on that. For punitive damages - which is where your attorney will make his money - start by asking for roughly $1million. Expect the defense to bargain down to about $100-200K before they offer to settle. And if you want to draw media attention, offer to waive some or all of the punitive damages if the doctor will agree to have the corresponding testicle removed. (It won't happen, but at least some people will get a chuckle and you can highlight the problem of unnecessary surgery.)