Also, the prior management had done a poor job and gave us upside in operating expenses and in rental income.How did you find this deal and how did you negotiate it?

Prior,  it was in inflation adjusted bonds.  

The bathroom is not properly ventilated / does not have an exhaust fan. we ran into this issue and gutted the bathroom after the owner prior let this continue for years.

A dryer is not an emergency and the tenant should be patient while you coordinate the repair.Because they ignored your instructions and chose to hire their own vendor, they should pay for the repair.I also recommend you learn how to handle aggressive or abusive renters.

It raised a couple of questions in my mind about the risks of wholesaling, namely the implications in the event that you assign a contract and the buyer backs out.It seems to me that Paid at Assignment would both:Result in committed assignees, otherwise they would risk losing the money they paid the assignor, andProvide the assignor with a significant cash cushion against breach of contract if they cannot locate another buyer prior to closing, and ultimately decide to cancel the contract with the property owner.But this raises another question. 

Should I require them to get a signed lease prior to closing and them assigned that to me?

This gives you recourse if the buyer stops making payments as you can have the courts enforce this performance deed and transfer ownership back to you.Just make sure you have a competent REAL ESTATE attorney review the documents prior to signing them to ensure that everything is properly worded to ensure you are protected.  

We ask our tenants to keep the grill on the patio or further from the home and instruct them not to use or store the grill in any garage or shed on the property.

Note, you may not be able to get all these things prior to an offer.

Which means that lenders don’t have much say in these loans – they have to follow the rules they are instructed to follow.Portfolio - I'll define these loans as loans that come from the bank's own "portfolio" of money.