Your answer is the zercher squat. Thats what i do as i train at home with no squat rack, seriously mate, its a great alternative which allows u to deadlift the weight off the floor and start squatting, just a tip.. buy some bandages, like the sort u wud put on a cut or somthing, their cheap and u can buy them in 6ft rolls for like £1.50 or somthing, wrap them around your elbows otherwise the grip it on the barbell will scratch your arms up.