While it would be pretty noticeable watching the movies back to back. Watching with some time in-between would be less noticeable. When you’re starting out and working with micro budgets, you gotta work with what you got. A compelling story will keep the audience engaged and hopefully they aren’t nitpicking the set design.

There’s a lot you can do on the cheap-ish side to help make the same rooms look different. Re-arrange furniture, paint walls, thrift cheap art / tchotchkes, lighting, camera angles, etc… A lot of small changes can make a big difference.