I heave heard of Entrust but not Sunwest. This article is kind of old so it might need some updating.
Note though that by the end the author says:
A Better Solution
I decided that Sunwest Trust had the best deal, but I may not end up using them. “Why not?”, you ask, (no doubt recoiling in dismay). The answer is that I found a better solution: It’s called an Individual K, or Solo 401K.
I’ll tell you all about it in my next post…
I never found that next post but it’s interesting nonetheless.