It may result in more turnover until I find the right tenants, but will give me some flexibility to raise rents, etc and also to get poor tenants out quicker.

A good prep job makes a project go quicker and last longer. 

I.E. if the property to purchase is $1m, down payment is $200k, and I have 3 investors putting in $50k each totaling $150k, and I use $50k of my own money, what are some optimal ways to setup the payback of the $150k outside money back to each investor, in the best/quickest way so we can roll into more properties at the fastest rate or deploy the money elsewhere, quicker?   

By focusing on reasonable, realistic and conservative outlook you can go further in a quicker period then focusing on getting the most money in the first few months.

But I figured I'd get creative in getting a response a bit quicker ;-).

Hopefully the promise of being able to save money faster and get into your "Dream Home" quicker will persuade her.Perhaps a spreadsheet of the difference or maybe just a quick calculation in a notebook will help convince her.By the way, your "Dream Home" will probably not be your last as your rental income goes up and you can afford the "Dream Dream Home"!

As long as the home carries the same construction quality, age, size and amenities as this price point, it may sell quicker at a higher price.

They do rent for more money and rent quicker.

Even then I'd just pay off your house three use that cash flow to build up cash quicker to buy a debt free rental.

There are people that might be doing things quicker, but there is a lot to say for getting quality properties that attract quality tenants.