Private lender will be close to a credit card interest rate for them to finance something like that.

-Cash Back on debit card payments (THIS IS THE BEST)-Higher APY than is typical on checking accounts 

First is that its difficult to quantify the amount to charge like you indicated.

Instead of giving me excuses, brushing me off, ect ect, my taxes were done in 3 days.My tax liability went down by 10k with my deductions (now finally added) and my new CPA charged me $1300 for my business, personal and WALKING ME THROUGH THE WHOLE PROCESS.True Books charged me $6500 to get to this point (and wanted another $1500 for the final leg) to basically have me rack up fines, brush me off and gaslight me as if this is the norm.I'm writing this review as I wish someone had written it for me. 0/5 stars.The only thing True Books got done in a timely matter was the cashing of my checks.Sorry!

How much would your conventional lender charge you to buy-down your rate too 4.5%? 

The reality is the opposite - if it's not in writing then the PMC doesn't have to provide the service or can charge extra for it!

@Sean Gallagher check the RBP addendum there is usually a clause saying if the property sells that the RBP can be canceled and the services are no longer provided and the charges don't have to be paid. 

Quote from @Sami Gren: I start by making the original tenant fill out a form requesting to add a new renter, and they pay me a $50 processing fee (I charge a $50 fee any time I make changes to an existing lease). 

Not many landlords buy their rentals this way. although with all the guru training many are trying and we will see how it all works out.it takes sales skill to talk people into deeding you their home.. this is a highly charged emotional situation..

Quote from @Brandon Larson: Yea, @Nathan Gesner is that legal to enroll someone in an insurance policy and then charge them for it?