As far as content or packaging of your letter, anything you can do to stand apart from other direct mail people will help your response.  

Others will step it up a notch and provide a "complete package" and really act as a trusted advisor for your business.

Now you have a property generating income for you... now what.... now you put the property back up for sale but now you have a new marketing package... now you are selling a Rental property that already has a tenant living there and already has a property manager managing it... a passive investment... 

I had 2 guys last years buy a package of houses, and they requested to use me.  

However, if you haven't taken any courses, you can take the 3 courses in a package. 

Hi Jon,I should have clarified, I was hoping to sell them as a single package of 4 properties.

If the lien holder is anything other than an individual investor or very small financial company, the note would be sold as part of a large package of delinquent notes. 

Being in Banking you should have a better idea of where people are more willing to lend and what things to be looking for when presenting lending packages.  

The pros of a HELOC:Line of credit up to 90%(depending on what bank used) LTV10 year interest only 20 year payback periodIf you pay principle down you can draw on the line as much as you wantLow interest ratesTax benefitCan be refinanced no money out of pocketThe cons of a HELOCBanks may charge 1 time annual feecannot sell property for 2-3 years (depending on bank) otherwise its subject to feesPain to establish (mortgage brokers dont want to do this because they dont get paid much)Just as Joe mentioned, if you prepare all the documents in advanced, banks can give you their preapproval package within 2-3 business days.Please let me know if you need any advice on whom to consider, I have a HELOC myself and did HELOCs for clients oftenBest of luck!

I would expect that they would have some type of a marketing package for you to review.