No, there is no free loan. Every loan comes with costs. Closings costs, if not paid upfront, will be rolled over into the loan.
The similar is the mortgage broker’s non-published commission, it seems to be paid by lender, but
it actually sends the final rate higher.
When adding more variables, such as, buying down points, it makes the loan price less comparable.
As for fsbo, I’d reserve 1% for MLS and ad cost, 2.5~3% for buyer/buyer agent, and leave the rest 1.5~1 % as additional incentive for buyer if the transaction could be closed quickly. it’s certainly not for everyone under every circumstance. As for buying, I’d look for professional RE service.