I'll admit that i have done a comprehensive amount of reading, have listened to all the BiggerPocket podcasts, read all of @Brandon Turner's books (thank you Brandon you rock), and listen to an average of one audio books per week in relation to business or real estate for the last 3 months.

I have to do the due diligence with the city to make sure the allowances for water, sewer, electric infrastructure can be accommodated.

Anticipating these needs, employing the technology (or making accommodations for it at a minimum) and building in safeguards is very important.

If a door way needs to be widened or some other accommodations or repairs need to be made the non profit pays for that.

I include another month of holding costs in my projections to accommodate extra time needed to close on the pre-sale.  

Tell them that you can work with them on breaking the lease and not losing any deposits if they in return help you with leaving the home ready to rent and allowing you to have limited showings prior to them leaving.Regular tenants would generally be very accommodating given they are being helped, so I would expect friends to be the same.

Most were accommodating but one tenant decided to stop paying rent from that point and moved out in the middle of the night without notice.  

Generally, it is better to try to come to an accommodation with the senior lien holder before purchasing at auction, but that can sometimes be a challenge depending on the nature of the loan and the identity of the lien holder.

I read a really good blogpost, https://www.biggerpockets.com/renewsblog/2015/05/10/invest-out-of-state-how-to-analyze-a-city/ that talks about a city's Comprehensive Annual Financial Report (CAFR).

The owners that we purchased from were very accommodating when we had open houses.