This shouldn't cost you a perceivable amount extra to maintain.Ramp: This will get rather expensive to maintain if it is made out of wood.  

Your lease should stipulate the minimum requirements of maintaining the home and what happens if they fail.

That's just one more thing to maintain. 

Market the unit widely on popular sites to get a number of applicantsScreen Tenants ThoroughlyCredit CheckCriminal Background CheckSex Offender, Felonies, etc.Check with previous landlord referencesVerify Employment / Assets / IncomeVerify IdentityBe reasonable with:PoliciesHave a fair set of rules at the property and stick with themPricesPrice the unit appropriately in the marketPropertyHave a well maintained propertyI have found that crappy properties attract crappy tenants

It does really well however I know it is not the solution to my goals in life and will not maintain the lifestyle I'm seeking.

The objective is the current owner wants to maintain monthly income for the next 10-15 years but he doesn't want the responsibility of maintaining the properties and the taxes.

Lawns maintained? 

C/D properties are often more expensive to maintain than you think2.

A few investors that i have know who have worked in the demographic (FYI I don't know anything beyond beer conversation) they needed boots on the ground to help maintain the property and ask questions.

Anything in real estate so much depends on the location, the type assets, surrounding amenities and what you expect it to do for you.I use Lockstate remote WiFi locks because they are currently the best and solve all the problems a modern smart-lock needs to accomplish: getting the right people through the door at the right times without me having to be there.I run and experiment with various Airbnb solutions:Manage villas for clients in TuscanyHost a turn of the century restored 6 room apartment in a quaint German city near the beach.Manage varying types of other apartments, condos, and houses in various locations in the USA and Europe.Keep in mind when dreaming of the "big bucks", it takes time to:Set up and maintain your Airbnb and various other accounts.Set up each new listing.Communicate with nice and not so nice guests.Factor in vacancies and damages.Outsource and manage cleaning and fixing team.Your dwelling needs to make at least the same income compared to the long-term rental if you're only looking to grow equity.