The question is do you offer a flate rate? or do you go by some crazy expensive $500 hr rate.
By avoiding the bloat of traditional law firms, I would pass a considerable saving onto my clients.
Due to the nature of bitcoins, I would propose fixed fee arrangements rather than an hourly rate. The fee could then be placed in escrow with a trusted third party and released when the agreed work was completed.
My real concern is that my experience is mostly focused on British law. It's probably only a small minority of forum users that are British and therefore perhaps I am fishing in a very small market. I wonder if there are any bitcoin blogs or news that focuses on the UK.
If you are a lawyer and have good credentials i would suggest contacting people who have been scammed in hardware thread etc. If you could prove a win against a company you will have many clients off board. I won't mention the companies you can look in hardware and altcoin to see which one's seem to be a scam.
First case most likely to get, but if you win lots of business to come.
"I could also advise on contract law or commercial disputes of any kind." most likely will not get you much. If you advise most to get a lawyer in the district etc you wont get much. This all depends.