I can't comment on condition of the mechanics but judging from the pictures the exterior looks to be in great shape.

Also can using a double closing/ transactional funding at the closing allow me to legally market the property due to the intent of purchasing it for myself only for a bit and then reselling the property I own? 

Has anyone used these closing agents to do an assignment contract or double close?

You may have to end up renting/double moving.

People think that everything double digit is risky or even smells fishy.

This would make you liable for fire safety, since you can't (at least in Texas) have a double keyed-deadbolt on an exit door. 

Concerning your situation, I would ask for a double security deposit to cover the credit scores and allow them a few months to pay it. 

Due to the volume of business we give them we expect priority service and volume pricing.We are trying to get them to take before and after pictures of the job they are doing to be able to upload it in our portal so the owner can see what was done (that has proven to be a bit of a challenge with 3rd party contractors) our in-house maintenance team is required to take pictures and video of any job they do. 

you can tell from my picture that I do not resemble the main stream  shape or skin color . 

There is no reason to bring your agent into the picture if you do not have to.