Solo-k where to host?

[Clinton Fisher]

I'm looking into a solo K as a one investment strategy for Real Estate. For those of you that have set those up I'm wondering how well they have worked for you and where do you park them? Do you like who you're dealing with? I would be moving money from a former employer, it's my wife's 401k and she left employment due to total and complete disability. From my understanding, she could access that money at any time without penalty? Or she could transfer it to a different financial institution. Just researching my options at this point, any help would be appreciated. Clint