if you have a chance even if you have a garage, look into building a spray booth that will remove the fumes and help contain the overspray, research how they are built and ask if he'll help, great job on saving the money to buy your airbrush however it sounds like your father might not be aware of the many different ways to exhaust dangerous fumes outside. respectfully show him that painting scale models can be safely done inside, REMEMBER no matter what is said here the gentleman is still your father. good luck and keep saving and modeling.