Thanks for all the replies. Got it figured out. For clarification if anybody runs into this in the future. Boat title we will obviously transfer. I typed an itemized bill of sale that includes the boat, motor, and trailer. The trailer was never titled to begin with because original owner never placed a loan on the purchase. Trailer is under 3000lbs so permanent registration card and sticker is all they were given. The bill of sale will allow me to transfer the boat, motor, and trailer. A title for the trailer will be created by the dmv because I am placing a lien on the purchase. Good to go!

I sure hope so!

I should add single axle trailer.

18 foot boat. 2020. Yes within MN.

From the MN DVS website

“Utility, boat, or snowmobile trailers with a gross vehicle weight of less than 4,500 pounds, unless there is a lien. The Minnesota registration card is acceptable proof of ownership in these cases”

He has the registration card. No prior loan on boat, motor, and trailer. Hence not having a title for the trailer. Boat obviously has a title.