They seem to be the best and most flexible that I have found in my area. 

You have to have the ability to be flexible with your plans and adjust when needed to accommodate a renter, if you want to be able to claim expenses  and show you are intending to make a profit

Benefit from his side is that he has a place to live in and flexibility to move (and then rent out) his unit when ever.

It helps that I start at 7 and finish up at 4, and my lunch break is flexible between 11 - 1 daily. 

This can often lead to more flexibility and better returns, especially if financing is involved in real estate transactions.

I am very flexible with work and work in Brownsburg as well.

If that is the case a home equity line of credit may be a easier and cheaper option that will allow you access to those funds and greater flexibility.

@Brandon Silvia - the largest problem with conventional lenders is that they are not flexible at all.

Tolerant and flexible won't bat an eye. 

IT's just that with Seller Financing the terms are often times more flexible than if you're dealing with a bank.