Look for clauses regarding default, collateral, and communication requirements.Document Everything: Keep a detailed record of all communications with the investor, including dates, what was discussed, and any updates you’ve received.

I'm assuming it mentions a set closing date.

The buyer requested a transfer from his job to the city where the house is but now the job wants him to start work next week, I told him we can probably let him and his family occupy the property prior to the closing date.  

Our Summer dates still fill in even with less than 7 day min stays.

I'm pretty new to real estate investing and have been using a manual texting app that just recently starting blocking me, so I'm looking for something more automated that knows how to circumvent / comply with the latest laws, without having to worry about downtime potential. 

Unless you wanted a dated grandma STR that nobody wants to rent, I would get furniture from Wayfair that is cohesive.

If I were you, I would do driving for dollars and use the money to buy the deal machine app and mojo dialer and coke call your leads. 

If you want to do postcards, DealMachine has a way that you can send post cards directly from the app/site.

The other has experience with real estate with multiple units, however, is way behind on up-to-date systems and technology. 

Common reasons:1) Change of closing date (instead of closing end of month, if it gets pushed to beginning of next month, prepaid taxes, interest and insurance will increase because you have through to months end)2) Appraisal comes in low and LTV goes up.