Load balancing guru needed

I am planning to throw out all other routers/proxy servers and replace with MT and would like to know if it would be possible:

Here is my setup:
WAN A:high latency line (cheap)
WAN B:line for local access only
WAN C:line for international access
WAN D:line for international access

LAN A:Wireless network (subnetted ± 120 MT sites)
LAN B:Local office LAN

Planning to use RB532A with MT-RB564 daughterboard to add 6 LANs & 16GB flash for proxy
OR
RB192 but it cannot take flash card?

All MT runing ROS3.2

Wants/needs:
Q1)PPTP server for ‘uncapped’ accounts routing all (local + international) out through WAN A
Q2)All traffic from LAN A & LAN B (not PPTP)should be split up to route local traffic through WAN B (masqueraded of course)
Q3)All traffic from LAN A & LAN B (not PPTP)should load balance international traffic between WAN C & WAN D(masqueraded of course)
Q4)All international https should be routed through WAN C
Q5)Possibility to add another local or international line later and load balance local with WAN B or international with WAN C & WAN D
Q6)Failover, i.e. if local goes down, route traffic through WAN C & WAN D, if WAN C fails, all international through WAN D(+https), etc.
Q7)Ability to read trafficlogs (like ‘old’ traffic logger) for my software to parse/analyse
Q8)Transparently proxy as much as possible(including windows updates)

Asking to much?
I would really like to know if it is realistically possible (not theoretically!) as I’ll order the stuff immediately.

Any advice appreciated, should I throw all on one router or maybe add more than one for simpler isolated setup?
Thanks
Ekkas

Yep, sounds like 99% of that can be done. Will take a bit to get it 100% perfect like you want it, but can be done.

Thank you for your response.

My main worries are the Load Balancing whilst also using proxy. I suppose once it is all working, I’ll work on scripts etc. to implement failover.

Also to get https working fine with load balancing. Do you (or someone else)have experience with it and is https sites working 100% with the example like in the wiki?

Thanks again, I’ll order the hardware and start…