for example:market rate today: $215,000Market Rent: $1550My thoughts are to do a 3 year lease option for a final price of $215,000. i would charge an initial option fee of one months rent $1550, rent of $1550, and a per month to principle of $250. my thoughts are that though they would be paying $1800 per month for a rent normally $1550, after the 3 years they would have the $1550 + $9000 (36 months * $250) for a total of $10,550, or just about 5% down towards the purchase. my thoughts are that way even if they are poor at saving, they at least will have enough down for a conventional or FHA loan, not including the fact that the value of the home will likely be greater than today.is this unreasonable to ask?

It would be different if it sounded like you were being unreasonable, but you're not.

I don't think its unreasonable at all to spend the time making your own XMIRR, I think its great! 

I've just been trying to get some perspective and even began to wonder if my course of action was correct or was I just being unrealistic and unreasonable. 

I find it really unreasonable that the 1st AC company is charging me almost $500 and all they did was replace an AC filter.

It would likely seem unreasonable that you couldnt have a roommate.  

@Irfan Raza while I will agree with you, understanding the time value of money I couldn’t afford to sit and wait as contractors didn’t get back to me or gave me unreasonable quotes.

Is $300 unreasonable?

Does that seem like enough or is that unreasonably low?

Like @Katie Stewart said, you could have them sign a strong pet addendum that outlines everything needed, including charging repairs back to the tenant for unreasonable damages AND a clause saying that the landlord can revoke the rights of any animal to be there at the landlords discretion.