I think it would be a very hard sell in a hospital environment (with which I'm unfortunately pretty familiar through treatment of family members). I can't even imagine working the details of what would be necessary in terms of state/federal regulation and hospital policy to accomplish what I think you're suggesting. The only time I've seen anything like this was when I saw a string trio (two violins and violas) play some pieces on a cardiac surgery floor -- and then it was privately arranged for the patient, and the door to his room was closed during the performance. It might work in some upscale private hospitals. But in something like a large teaching hospital with teams of doctors and support people roaming on rounds constantly up and down the hallways, conferencing both in hallways and in patients' rooms, etc., ... I'm not seeing it.
Nursing homes, hospices, long term care, and rehabilitation facilities MIGHT be reasonable targets. But I'd investigate the genuine possibilities and requirements before developing anything further. It's not an "if I build it, they will come" sort of situation.
Gary Merrill
Wessex EEb Bass tuba (DW 3XL or 2XL)
Mack Brass Compensating Euph (DE N106, Euph J, J9 euph)
Amati Oval Euph (DE 104, Euph J, J6 euph)
1924 Buescher 3-valve Eb tuba (with std US receiver), Kelly 25
Schiller American Heritage 7B clone bass trombone (DE LB K/K10/112/14 Lexan, Brass Ark MV50R)
1947 Olds "Standard" trombone (Olds #3)