Source for "Subject To" Contract. Finding an Attorney Who Knows

[William Coet]

Hello,

I am considering "subject to", but want to have a good contract.  Can anybody recommmend how I can find one and how I can find an attorney that is familiar with them?

My understanding is that there are some important considerations to prevent the loan from being called due.  I also need to make sure the seller is comfortable with the deal.

Thank you