Private lender - forms required??

[Yia Her]

I am looking to see what forms and documents to use when borrowing money from a private investor.  I have a few private investor willing to lend their money on a deal that I am working on.  I will need to secure their interest onto the deed of trust but need help with a document that can get this done.  We have already worked out the terms and agreement on the money lent.  Thanks for your help.  

Scenario:

Purchase price: $185K 

Rehab: $30K (my contractor and I est. $25K) 

ARV: $295K

My capital invested: $125K (I have additional rehab capital of $50K)

Capital Funds needed: $60K on 12% 

Turn around time is: 90 days max.  Properties are moving off the market in 5-7 days.  

Thanks