I own a townhome with about $75000 in equity. i'd like to keep the twonhome and purchase a 4 unit apartment

or 4 unit condo in which i can rent out the 4 units. i may like to rent out my townhome and live inexpensively in the 4 unit building and rent out the other 3 units. I don't have much or any money to put down to purchase the 4 unit building. can i use the home equity i have in the townhome? how else can i get started in purchasing a 4 unit building which i can rent out. I don't expect to make much as far as rental income for myself and understand most money goes right back into the mortgage payments for the building itself. i am fine with that. I am mostly concerned with just getting started. thanks for your istance and sorry for my typos.