Bowflex (and similar machines) are junk and over priced. I have assembled several for people, appalled at the quality (I am an engineer). The movements appear to be designed by school kids. Great coat hangers and a fantastic marketing ploy. If you really want one, there are clones for much cheaper.
Best to outfit a garage or basement with at least a power rack, bench press, safety stands for free weight work, a pulley machine for high and low pulley work, a good leg extension/leg curl, a flat and incline to straight up free bench, a set of dumbells (or dumbell bars with weights), a Olympic weight set (the equipment to be designed for Olympic bars). Can add leg presses, sit up boards, deadlifting platform, incline and decline benches. Cardio equipment is expensive, should be able to save money by swimming, running, biking, etc. For indoors, a used commercial quality ellipical trainer is good.
Best to buy from hardcore equipment outfits. This includes Polak Made (polakmade.com), Louie Simmons (Westside Barbell), Forza, Hammer Strength (expensive), there are a number of others. Stay away from Sears, Walmart, K-mart, Dicks, etc.