Creative Seller financing legal structures?

[Brett Deas]

I am acquiring a property in WA and the breakdown is pretty simple 200,000 Down-150,000-200,000 Seller Finance-700,000 Mortgage. We have 2 good lending options but as money of you probably know, they want to be the first and ONLY lien on the property. I'm curious if any of you have had to deal with something like this, and how you were able to work around it. 

I am currently thinking, if the seller is comfortable, either just a loan with the LLC that will own the property or a silent lien (still out with the lender if this will work). What do you guys think?