I have the opportunity to buy an off market double wide manufactured home for half of market value, but because it was built prior to 1976 I can’t get anyone to lend on it. Seller is hesitant to do seller financing as...

Most lenders that she has approached wont lend to her because this is her first BRRRR; no experience. 

Mortgage.

Are there any hard money/private money lenders that openly allow you to wrap their money with a note to an end buyer?

Counter argument:Paying off a house reduces risk by eliminating mortgage payments.

The new listings I have seen are laughably expensive (mortgage is 2x rents for example). 

I am looking for guidance on best lenders in Wa State.

It's obviously better than owning without any offset to that mortgage payment. 

Goal is to move mid-late 2024  Purchase June 2022: $510,500Down Payment: $102,100Interest rate: 4.875%Mortgage balance: $397,959Monthly mortgage, tax, insurance:$2,465Estimated rent $3,000 The home has an estimated sell price of $550,000 today and the area will continue to appreciate well.Home is in good shape.

Following David Green's Core 4 strategy (realtor, contractor, property manager, and lender) gives confidence to invest anywhere.