I've not denied a repair request PM has placed forth, and am always timely and specific as I ask lots of questions.

As far as backing out yes you can request your Escrow deposit back during the inspection period for any reason you deem fit, many individuals will say it is a free look however professionally that not the best description since it is not free, with any due diligence you invest in inspections and other professional services to answer as many unknowns as possible to remove as much risk as you can prior to purchase.

On your HELOC application, did you request an amount you wanted to borrow or just the maximum LTV?

Send me a PM if you want to know my one possible suggestion and why I'm still hesitant about them, another you could use if you make sure to stay on top of maintenance requests and rent yourself and a third to absolutely, under no circumstances use! 

Borrowers can request for loan modifications to postpone the sale many times.

Thanks Chris I sent you a connection request. 

I terminated the company, but the company is irresponsive to my requests to send me the rent payments.

I would request a copy of her tax returns as well.

You contractor can actually request payment from you via Zelle, which will be more secure since you inherently have his account info at that point via the request. 

Reach out to 2 or 3 and request an initial call and then hire who you think will best look after your interests.