Catch about 1 out of 3 people now.  

What are the biggest challenges people have faced with this.

You need a license if you're going to manage other people's properties.

As a sidenote I see people doing this and jacking up the price of the home to seller finance to above market value - if you do this you better be VERY clear with your investors that you are writing a $300k loan on a $250k property as if you do not you can get in some serious hot water later on down the line when doing valuations of the company. 

ThanksDan there are people who do "Gator" lending which is a guru course taught about this type of lending.

People will always vacation.  

The subgroups are usually smaller and easier to get to know people.

@Mitchel Johnson Welcome to BP and I wish you the best in investing..Usually people start by going to local meetups and building a network of trusted people to get their feet wetHere is an examplehttps://www.meetup.com/find/?

I placed them within dated folders so people don't have to search for what date the appraisals where done.

My best contractors over thirty years of flipping were always people I met through networking or other investors or trial and error, never online.