brother in law has large green tank at his home with 2 3hour portable tanks. He uses it only at night for 8 hours and cannot go anywhere overnight without paying $125.00 for a 10 day rental. We are looking to purchase an oxygenator. I found one for 795.00. They are currently in low income housing and are paying $20.00 per month for the large tank. How much would medicare pay towards the new oxygenator? They could give the large tank back and own their own to have more freedom. They live in Waltham, MA and we try to have them here, in Maine, every 6 - 8 weeks. The 125.00 rental for 3 - 4 days is still charging for the full 10 days. I understand that. We cannot keep paying that rental [and wasted $$] . We are their only place they go and often stay 3 to 4 days. Can you help us?