This is a full list of console commands and cheat, it will help with many things but unfortunately no instant build option is there...
nopausetext - Toggles the pausebanner for nicer screenshots.
nextsong - Changes the currently playing soundtrack.
date [date in format yyyy.mm.dd] - Changes current date
time - What time is it?
oos - Make the client go oos
combatsound - How often does the combat view give a random sound? 0-50
morehumans(humans) [num] - Adds more humans
window(wnd) [Arguments: open/close] [window gui name] - Opens or closes the specified window
reload [file name] - Reloads the gui or lua file
reloadinterface - Reloads the entire interface
reloadfx [Arguments: map/mapname/postfx or *.fx filename] - Reloads the shader
reloadtexture [texture file name] - Reloads the specified texture
reloadloc - Reloads the localisation
poll - Polls valid Events
event [event id] [
] - Executes an event
die(kill) [] - Kills the monarch of a tag
add_heir [] - Adds a heir of a tag
kill_heir [] - Kills the heir of a tag
siege [] - Wins the siege in the specified province
annex [] - Begin annex/annexes the specified tag
integrate [] - Begin integrate/integrates the specified tag
vassalize [] - Vassalize the specified tag
discover [] - Discover capital of target tag
winwars - Gives max war score in all wars for the country
spritelevel [] - Sets a forced sprite level. Specify no argument to reset.
papvotes - Shows all votes for a cardinal in the tooltip of his name
kill_cardinal - Kills the first cardinal in the list
clear - Clears the console
validateevents - Validates all events without triggering it
testevent [] [] - Tests an event without triggering it
testmission [] - Tests a mission without triggering it
cash [] - Adds gold to the player
population [] [] - Adds population to a province.
setmissionaryprogress [] [] - Sets the missionary progress for a province.
manpower [] - Adds manpower to player
add_natives [] [] - Add natives to given province
add_reformlevel [] - Add reform level to the empire
add_opinion [] - Add opinion to/from tag
add_pi [] - Add papal influence to tag
add_pa [] - Add patriach authority to tag
add_cb [] [] - Add casus belli against target country
remove_cb [] [] - Remove casus belli from target country
tag [] - Switch tag to another country
reset_mission_cancel [] - Switch tag to another country
remove_defender_faith - Removes the defender of the Faith for the players religion
add_missionary [] - Adds a missionary to a country
add_colonist [] - Adds a colonist to a country
add_interest [] - Add specified country tag to your interest
remove_interest [] - Removes specified country tag from your interest
add_diplo - Adds diplomatic entroute
add_idea_group [] - Adds the specified idea group
power [] - Adds the specified idea group
powerpoints [ OPTIONAL] - Get power in all powers
adm [ OPTIONAL] - Get administrative power
dip [ OPTIONAL] - Get diplomatic power
mil [ OPTIONAL] - Get military power
piety [ OPTIONAL] - Get/Add piety
stability [ OPTIONAL] - Increase the stability of your country
imperial_authority [] - Increase your Imperial Authority
prestige [] - Increase your prestige
PrintSynchStuff - Prints random count and seed
SetRandomCount - Sets the randomcount to 0 or arg
observe(spectator) - Switches to play no country at all, and no longer shows messages or pauses the game
fow(debug_fow) [ OPTIONAL] - Turns off fog of war in a province or in general
collision(debug_collision) - Toggles debug display of normals/bounding boxes/collision
ti(debug_ti) - Toggles Terra Incognita on/off
savegame - Creates an savefile.
IP - Shows your IP
requestgamestate - Requests the gamestate from host
nudge - Go to the nudge tool
revolt [] - Starts a Revolt in a province
pirate [] - Starts a Pirate in a province
legitimacy [] - Set the legitimacy of the ruler
mapmode [Mapmode type (int)] - Change mapmode.
fullscreen - Toggles fullscreen
score - Score output.
balance - Region Balance output.
prices - Price Info
add_core [] - Add core
remove_core [] - Remove core
own [] - Change ownership
controll [] - Change controller
selflearningai - Enables/Disables Self-Learning AI
aiview - Toggles additional AI info
yesman - Toggles AI positive responses
memory - Prints out the used memory
msg - Toggles all messages popup
helplog - Print out all console commands to game.log file.
help [command name] - Print out all console commands or a specific command description.
helphelp - Double Rainbow help.