Using property management software and virtual tours can also help you manage your investments effectively from afar.

Please DM me as I am always baking off REI Software products and giving it a thumbs up/down, or meh.... etc. 

John is right about the enemy method, its the only accurate way to estimate revenue.The blanket estimated revenue amounts on analysis websites like AirDNA can be a decent baseline, but generally include too big a pool of properties to give a very precise estimate.The way I use the enemy method: Sign up for a pricing software that has market analysis (I use PriceLabs but most of the pricing softwares have this feature).

I found my insurance broker, Steadily, through a BP podcast ad, I found Baselane to use for banking through a forums ad, I found RentRedi which I've used as my PM software for years as a sponsored post.

We didn't build some sexy software application in silicon valley.

It looks like a great software and a few cool bonuses, but who know if it actually works.

As a PM and a fiduciary to my clients I use a more complex software than most self managers use and also employ a live revenue manager to scan my local area. 

However, you are limited as to what you can do compared to the software option.I personally have not used either on a Mac so I can't help you there. 

Does anyone know a property management software for a small landlord (10 to 15 units) that allows ach draft?

You can click on them next to my picture.I happen to use Act, but I recently did an article on my blog about some nice contact management software you can get free.