Also, how should I present the offer to the seller considering that this isn't all cash?

I think rent to own is usually done by landlords who don’t want to sell and just want to keep a large option payment. 

You may be confusing 'profit' with 'cash from the sale'.

Purchase price: $440,000 Cash invested: $20,000 4bed 2.5 bath 1811sq ft - New build from D.R.

If you refinance the rental house and get the equity out, you'll end up with a higher interest rate and a good amount of cash to use on your next house. 

I want to know my payment is fixed for the foreseeable future and can adjust accordingly if needed. 

Purchase price: $150,000 Cash invested: $100,000 Recently completed a purchase and renovation of a multi-family house in Cleveland Heights, Ohio (BRRRR Method).

It’s been unable to sell because the original house was a single wide in the 70s that was then added on to.This makes financing either difficult or very expensive for people (especially since it’s a low price point and mainly first time buyers).We would be paying cash - so it’s not an issue for us.

DSCR is calculated by using the monthly market rent or lease (up to 120%) and dividing it by the Principal, Interest, Taxes and Insurance Payment. 2.

I’ll be very upfront and honest- I have about $20,000 saved for a down-payment/closing costs.