Its going to cost you a grand to start with to gain the level 2 certificate, which will enable you to buy the professional products, you will also need to decide whether you are going for rural side ie. rabbits, squirrel ect, or are you going to go for bed bugs, fleas and stuff, maybe you have enough money to cover all aspects which will require a lot of equipment to start, do a search on here and you will find plenty of info and answers