Do i need an agent or lawyer to draft an offer letter?

[Kristi Harmon]

I'm working with a seller that doesn't want to involve an agent, if I do then they will increase the house price by ~$8000 (which would be 3% agent fee). Owner uses https://www.homie.com/ to schedule tours and take offers. After viewing the house I sent them an offer and the website sent me the following reply:

"Thanks for your offer on ...(address). Are you currently working with a real estate agent? If not, please meet ....(name of an attorney), an outside attorney who can help you finish completing your offer.

Let us know and ...(name of an attorney) will reach out to you if you don't have an agent. If you do, please work with your agent to finalize a REPC."

So do I want to have my agent fill out the offer letter and pay him $8000 or attorney that probably costs me ~$600 or can I draft one myself (and have a title company hold the earnest money deposit)? 

P.S. The owner hasn't accepted my offer yet.