I have not done any room treatment yet. Found a DIY video that shows how to make some panels for cheap with wooden frames and towels. https://youtu.be/pABvTWSxOes
This is in my budget range. And my 'studio' is also my wife and I's bedroom so facing limitations there too. No monitors yet either. lol. Will probably get Kali-LP6's. Thought it was a great video and wanted to share it for other members on a budget.