A good extractor above your hob will help, if it can be ducted through an outside wall. Make sure you observe the clearances stated in the extractor's installation guide (usually 75cm above a gas hob)
If that is not possible you can have an expelair fitted in an outside wall or in a window to clear the steam, smoke and cooking smells.
£30 will be enough to get proper extraction fan. On the external wall you can fit cover that will open when air pushed out from inside and close to prevent any air flow from outside (another £3 to £5 for that). Of course account for electrician to fit it and the either you or decorator to bring the wall back to it's previous condition.