I have looked around online, but haven't had any luck yet, i have local real estate agent there, but they are not expertised on those distressed properties.  

Look at other rentals in the area and see not only how they are advertising or promoting online but also the inside and outside of the rental so you can create a similar environment to try to replicate the same results.

is there a way for me to create an online STR guestbook for free? 

If you know of any online forums or organizations where I can learn from others and expand my network and knowledge on wholesaling or getting my first deal, I’d really appreciate any recommendations Thanks in advance for your help!

Finally, always get the credentials to access the mortgage account online and change the email notifications to your address.

When the date came he said he wasn't going to submit it by the online app (stipulated in the lease) but would have it in cash and that we could come pick it up (we live 3 hours away). 

It truly shows your commitment to provide your current and future clients a better experience.I know that online reviews can take the best of one's head space and it can take a toll on the business. 

You can also check their reviews online at Google, Facebook, or Yelp.

If you want to put the deposit in a out of state/online bank, then you will have to furnish a bond.  

To managed it a bit easier (when you grow to more than a dozen), it'll be better to have one online login and manage all 'child' accounts.