This means for every dollar of his lease payment, he gets a 50.88% discount and his true cost is only $0.4912 per dollar.

In ordinary circumstances I would discount a ten year mortgage completely, but with a premium of about 1% the question is basically whether you think mortgage rates are going to rise more than 2% from where they are now over the course of the next five years. 

If it's in the budget hire a cleaning service(contract with them for future services and get a discount).

Yeah, and the buyer discounts their offer by at least 1% to make up the difference.

Buy on a big enough discount to allow yourself to sell quickly and with minimal to no loss would have to be the most favorable in my opinion. 

With that much of a discount, it sounds like you have many exit strategies.

another way to create $100 more is to create a base rent and get a discount rentSay market rent is 1000you could give a discount rent of 950 base rent of 1050 to get the discount tenant must pay by 1st of the month or pay standard late fee 

That is a 33% discount! 

I told him his rent was discounted because he's responsible for utilities and that I wasn't paying his utilities.  

I don't think the terms are very favorable for you so you should buy at a discount and wholesale.