However, the LLC is supposedly the protection and will be the beneficial holder of the trusts.

When they see the insurance certificate with the LLC as the deed holder won't they become aware of the transfer anyway?

Or from the Assignment of Mortgage Bank Y is the senior line holder ?

Your anecdote above suggests you're a long term holder (10+ years) which is going to draw your eye to the equity multiple.

The law is geared towards protecting the owner, other interest holders, and the municipality that does tax sale.

However the lien holders have to be notified and proper procedures followed for this to happen.

Also, in the info below )found from the tax deed sale website), what does the USA -FHA mean as a lien holder?

Some will say they take the money and buy or lend against real estate but read the fine print, you are an unsecured lien holder (this is the case in 99.9% of offerings that show returns above 13%.)3.

One thing I would ask the attorney about is a structure of you being a mortgagee versus you being the tax lien holder.  

The seller becomes the bank and first place lien holder.