Developing a full-duplex mesh Hotspot Network

Hi all,
I’m planning to build up a mesh-network in my neighborhood. I want to combine this with a hotspot service.

The customers should finally be able to choose between two options to get access to the network (and www):
Opt. 1) One time Buy of the wireless Router and a monthly fee of 5-10 $
Opt. 2) No Buy but monthly fee of 15 $

The network design would look like this: click here

My questions are:
1.) Is the Implementation of the considered network design possible with mikrotik hardware/router os?
2.) I want to integrate three 802.11n radios into each Access Point to get a full-duplex mesh network withput multihop-loss. Is this possible with Mikrotik?
3.) Can I loadbalance the traffic between the two gateways? Will I expect to have problems with https-sites?

Thanks in advance! :wink: