Shawkani was anti-Taqleed, anti-Madhab, and pro-Ijtihad, so obviously his opinion leans towards greater allowance of Ijtihad. Honestly, if that is all that's required for Ijtihad, then there are multiple people here on this forum who are capable of it, and it would only take a few years of study to reach the level of Ijtihad. Certainly less than the 8-10 years that the Dars Nizami course requires before a person can be called a Mufti, which is funny when you think about how Salafis accuse Deobandis of throwing around labels like Aalim and Mufti too freely.
Yes, they are the ones who claim to have mujtahids in each and every house!
there are very few people in the world whom salafis consider muftis and mujtahids. Most salafis will state that there are no muftis or mujtahids in europe.