If you have a garage, basement or spare lower floor room...than by all means a Power Rack. This will insure safety if working out alone. Include a good and solid adjustable bench (commercial gym quality). Can easily setup a chinning bar on a PR. Than Olympic bar, with around 300lbs to start. Power block (if you got the bucks) or a adjustable pair of DB's. Can even throw in a extra workout bar, usually handy to have around.
Apartment or small house space: A dip/chin station (very useful). Usually BB & DB sets. Adjustable bench, which can also give a good ab workout. Squat stand also. Could do BB Hack squats or DB step up's if not wanting to have a squat stand (safety maybe?).
If short on money, than try looking on line (Craigs List, etc), local ad advisers, newspapers, etc. Or place a ad your self, saying something like equipment wanted. Most used workout equipment is hardly used at all and can get a fair price on a lot of it. Might need a truck or van to haul some of the equipment away, that you buy. Try not buying too much big & heavy stuff that has to be shipped to your home. With the money you save, can always invest in more equipment. Good Luck