Assuming you just manage your own properties, not other people's properties, you can use Buildium for management tasks (keeping track of maintenance, store documents, communication, etc.,) and use QuickBooks for everything related to accounting/financials.

We want to create a fresh home without turning off potential buyers.Thanks in advance!

Andrew,i live in a rural location where the convenient store has the Post office attached/renting from them.i know the owner pretty well & can inquire)let you know. 

I would touch up the walls and make the place feel as fresh as possible for showings.

Again, the BiggerPockets store has some books on this topic, or you can learn about it by watching podcasts, reading blogs, and interacting on the forum.

Look at thrift stores and second hand items for some thing-get sturdy things in good condition. 

He sent me an address to a vacant lot and to a ups store as his home address.

This is the perfect example.We have been using the leses and other froms from WLB for over a decade and I have seen them getting updated over the years, so I somtimes throw out a package of forms and order new ones to be up to date, but they are so inexpensive, its a no brainer.WLB has a store downtown Milwaukee worth visiting: they have all sorts of landlord supplies you did not even know you needed from print all the way to parking signs and traffic cones.

Quote from @David Weitzel: I'm not familiar with your market as well but I would always suggest taking a fresh look at your base marketing.

I have had good luck finding cool unique pieces in local stores to the property.