As you’re in India (Chennai/Tamil Nadu), this is what “affordable” and “hospital-quality” translate to: For a 5 L/min machine (which is more for home use), the prices can begin around ₹30,000-₹50,000 (depending on brand/features) in India. For bigger flow machines (8-10 L/min) or ones that are more “hospital-grade”, the price increases (₹70,000 +) but you also get better specifications. An economical machine doesn’t have to be cheapest; it must strike a balance between quality + service + features. If you cut too much on brand or specs, you may end up with breakdowns or inefficacy .Look at long-term cost: renting may appear cheaper short term but if you require it for the long term, buying could be the better option. Verify local service/support in Chennai/Tamil Nadu. A foreign inexpensive brand may not be easily serviceable locally. Be cautious of scams. There were a lot of listings during COVID-19 for machines that had high specs but didn’t perform.”