I've been using 2 of those very same models at my office for the past 2 years now, great piece of hardware as long as you don't push the cpu with too many queues or firewall rules. I have it setup with ~250 queues and about 10 firewall rules, working fine so far. Plus, it comes with a SFP slot, meaning you could skip the media converter provided by Fiberlink and stick the fiber directly into the RB2011.
I remember getting both at around ~17k each, so 7k is not bad, I've been using a Mikrotik hAP, bought for 8k, to run at the house. Was lying around catching dust at the office so thought why not [emoji14]
But note, I've been getting really bad wifi speeds on the hAP. My office connection is only a 40MB so haven't been able to test if it can support 100mb on wifi.
On a side note, the rb2011 is a router and not an access point, per say. So what are you now using as a router with the Ubiquiti AP's?