For the wings i'd have them hinging forward, that way once there activated the wind resistance is asisting.

may be a simple servo actuated retaineng mecanisim with a spring and a latch once there open.

as for the engine start what about a small turbine, that way the thrust to weightwould be good and you could use compressed air for start.

All depends on the $$$ you can spend.

there are remote glow and starter systems for the more traditional model engines, try asking over at the giant and scale forums.

also fo safty i'd seriously consider a safty parachute system for a model that heavy