noob starting to airbrush?

[cigbunt]

hi i've all ways wanted to try airbrushing...

can some one point in the right direction of what i'd need? (less than £100 probably used?)

ive got no outside space but got a spare cream carpeted box bedroom does it need to be well ventilated when working with polly paint? i'd probably try doing some canvas's as well which i guess would be a water based?

will i need alot of space and is there mess?