I've been selling 12% interest three year notes for the last five years and the program runs perfectly BECAUSE of the unique underwriting requirements of the loan, cash from the investor and safeties in taking the property back.

It's a unique industry and there are some good threads here that discuss various expenses.It can also be a nice way to own a vacation property and have the place pay for itself.

How were you able to structure the day-to-day single parenting tasks as well as doing REI from home (talking with buyers and sellers and viewing properties)?

But if you were to build something custom and unique would likely draw attention and a willing buyer.  

Every seller has a unique situation. 

There are TONS of cash buyers, so "I pay cash" is not a unique selling proposition.

We're a small firm with a unique marketing plan, a highly dedicated group of agents, and don't come with any of the per-conceived notions buyers might have of other companies". 

The optimal frequency with which to send out your letters and your ROR will be something unique to your market.

We're new landlords and this is a unique situation for us.

If you're up to the task, I'd recommend building your own.