You would pay a lot £750 and although you could use it on your elbow.

You would have to do a course and have some knowledge of anatomy to be able to do it correctly without hurting yourself.

Better finding a practitioner yourself and getting 10 sessions while also doing your stretches and exercises from physio.

Cost will be much lower than buying a machine.

If your looking for a cheap
Solution a cortisone injection would be available from gp but is only about 50-60% successful and even then you would have to do exercise. There are also problems with tendon weakening.

Hope that helps,