For upper body and core nothing really beats a set of gymnastics rings which you can get for around 25 euro/dollar. It’s probably the most value for money piece of fitness equipment there is. For legs I have switched to single legged exercises, so you don’t need a lot of weight
Having your own home gym is actually great. you can workout whenever you want. I have actually recently added many new equipment’s in my home gym such as jammer arms, kettlebells and also bumper plates.
Got a good deal from rug rig fitness. you can give it a try if you are looking for home gym solutions.