It requires a solid FICO, that you get pre-approved with all current financials held in file beforehand, with the complete contract package submitted upon execution which starts the clock; insurance must be arranged within three days for lender underwriting. 

I encounter this semi often as I broker to buyers and also own a PM company so often have to do the same or similar transition as you are looking for, for my clients. 

Oh and it's even more fun when you get a surprise package in the mail with fun stuff and apparel! 

I know I can create a series of my own documents regarding this in Word and Excel, but am wondering if there is some kind of software package out there that handles this problem?

I don't know how to post documents to my profile yet or if that's a thing but I just made a 4 page ASR package based off of another site.

Search the BP for ADU appraisals to encounter numerous examples.

You should treat it as a luxury package rather than regular STR. 

For example, I can't see a way to use any marketing packages??? 

I personally had two encounters with Zach.

I have encountered a few who did not.