Alpha, I think pretty much all UK solicitors offer half hour free consultations. If you can, I would see at least 2 or 3 (your Q's develop as you go along) before you choose someone.

Once you actually choose someone and start consulting with them, the costs do mount. My S charges £220/hour, which I think is pretty standard if they are a partner in the firm.

Your sitch is similar to mine in that we are trying to save the M, there is an OP involved and your S has now asked to sell the house. I was quite keen just to sell and not settle anything else for now. But my S advised strongly against it. This may depend on how complex/substantial your assets are. I posted her advice on my sitch & will post a link for you.

My H didn't want to involve L's, but I told him I wouldn't want us to take such a big step without proper advice. We have also chosen solicitors who practice 'collaborative law.' This is something to ask those whom you see.

I found it hard to take the step of seeking a L, but I am glad now that I did..

T 13 M 7
Me 48 H 46
SS 15
BD 7.14 PA
D final 5.16 (H filed)

We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus