They don't ask for any documents just do a credit check and you fill out their application.

Don't give up the pursuit.Fail fast works better in software than in real estate: reset the server, push a patch, etc. 

You can buy a set of five for under $300, subscription for the recording software is $10 a month, then the cost of WiFi or hotspot.If you've already had a couple break-ins, you are obviously in a high-crime area.

We rent to plenty of S8 applicants; I've always believed the standard of care they exude is as high if not higher than "market" applicants because they'll get kicked out of the program if they don't.

We like the software, but the consulting service seems taking a bit too long... we would like to have someone to help us out with set ups, automation and a general marketing plan...

Here's a detailed guide on how to screen applicants: Application Screening Guide

Whether you need a CPA with just three rentals depends on the complexity of your situation and your comfort level with DIY tax prep.If things are pretty straightforward, you might be fine with tax software for now.

What rent collection software do you recommend and why?

I definitely get most of my information here + my software email updates usually keep me pretty well informed. 

. ;)Preference is electronic transfer through my management software.