I'm sure if you google the subject you will find all you need to maintain a reasonable level of fitness. Might I suggest if you have the room look for used exercise equipment. I like free weights best, Dumbbells specifically, But Ive seen machines somebody paid $1,000's of dollars for go for almost nothing. Some just want to get rid of that monstrosity.
The benefit of dumbbells is you can find a weight that is best suited to your condition. Whether you start curling 20 lbs, or want to be a competitive lifter using 50+ lbs. Same idea with the other 10 exercises I do. When I'm done, a rack of 12 pair of dumbbells and a folding bench take up about 8 sq. ft. of floor space.