If this is a re-sale, you should have conducted an inspection, and that inspector, should have caught the defective plumbing material and brought it to your attention to make the necessary steps to have this issue remedied, compensated or allow you to exercise the ability to walk away. 

I think it is important to have clearly defined roles on the team and to acknowledge that each person is responsible for contributing their share and doing their part to keep the team prosperous for all members.  

Two of the units are occupied by a handicap housing company which i also spoke to the people in the office explaining my new role.

in the role i'm considering he is the one funding the deal, but does that mean he pays for the whole purchase price or the down payment for the loan?

However, it does shift roles of parties under the Option is exercised.

They claim that the wholesalers are not real buyers, only closing if they FIND the real buyer, therefore they are in effect selling the property on behalf of the seller.The wholesaler's argument is that they are PRINCIPALS in the transaction, exercising their right to withdraw from the contract if contingencies are not met, or by exercising the purchase option often now included in purchase contracts.  

My goal is to one day reverse roles and become a full-time investor. :)I look forward to networking!

Assuming you understand the client’s motivation and you provide him the solutions required for HIM to overcome his problems, objection handing is nothing more than an exercise is restating the obvious: He’s got a problem; you’ve got the solution, and now he has to make a decision.

They have an option period, say between the twentieth and twenty fourth month of a two year lease to exercise their option and purchase the home.

The laser focus now is on the property conditon, getting your mind around potential defects, any rot, termite damage, and costs to repair or replace aspects of the home or walk away (and check the exact timelines for you to exercise this option in the contract or resolve it with the buyer)...