The plan is usually tailored to the intended reader and emphasis is placed on the purpose, a lender, a civic group proposal, to a municipal office for a project, to investors or partners.

Also, with the NACA program, as mentioned by @Andrew Garcia this program could be an option but it’s tailored more for people who want to live in their home for the rest of their life.  

OodleRentals.comRent JungleByowner.comRentalads.comSublet.com (this one might be tailored to a furnised rental or looking specifically for a subleaser)Saletraderent.comApartment GuideMy New PlacePeople with Pets (might require a subscribtion!)

There are really great CRMs out there that are not necessarily tailored to residential real estate client management...but are far superior for managing massive amounts of customer / client data and your daily battle rhythm / calendar.

They will be able to provide you with tailored advice based on your unique situation.

That is why it is important to have a local agent that specializes in rental properties, so you are able to ask them these questions and they can help you tailor your searches. 

My strategies have changed over time and I am still using a number of them, mostly because each deal is unique and the opportunities are somewhat tailored to the deal.

Now, I find the more personalized you make your letters and tailor them to the owner and all the info you can drudge up, the closer you are to a real conversation which is closer to a deal.

Hey Max - your best bet is to contact several lenders (both local and national) for options tailored to that property as there are a lot of variables that will be specific to your potential deal like vacancy requirements, rates, product offerings, reserve requirements, etc. 

One of the variables, I have noticed, that likely has a large impact on the reliability of income from rentals is the specific demographic(s) that the properties in one's portfolio is/are tailored to.