I've done HDMI edge connectors like this using plain HASL without too much trouble. Just don't forget to remove all soldermask on the connector path, they'll dirty out quickly otherwise.

But, now I do ENIG everywhere because it's often the same price as lead-free HASL (or so close it does not matter), while looking way cooler. I've started to take quite seriously leaded stuff now, especially since low temperature lead-free solder exists (SAC305).