I just looked at my bank account and noticed we added $30,000 to savings in the last two months without being frugal or any focused effort. 

Some other resources I use that are free of charge:Turbo Tenant Stessa (accounting/expense/income tracking)Other investors rather have other paid for programs that included notices/group e-mails, etc...

Yeah I’ve noticed from my rentals time of year makes a huge difference.

Waiting to get some new renters now, but the asking rent for the updated unit is noticeably higher than the other two units.

Also noticed that the wireless keypads outside the door do not have the option for two PINS.

We made sure our gutters were always cleared and have leaf blocks over them.When it still continued, my contractors noticed that my neighbors gutters were blocked and that there was a 4" by 2" by 2"  hole behind the gutter where the wood or brick had disintegrated. 

Things didn't slow noticeably. 

I've provided the tenants with several months of notice that rents will be going up with their upcoming lease renewals. 23 units * $75 average increase * 12 months * 90% occupancy = $18,630 / year additional NOI. 

Also, I noticed a little red flag that may effect future profit?

If you have notice from an exiting renter, you can usually dove-tail their exit and the new tenant's start date within a few days.