I’m sorry to hear about your difficulties.
I’m confused on the type of heating system that you have. You mention solar panels leaking. Are you talking about photovoltaic cells? I am thinking ‘no’ since they wouldn’t leak water.
We have a solar-heated pool using this system. https://enersol.com
I don’t recall what we paid for it. It works very well and I would think that you could repair such a system for much less than $6K. A 1’ x 10’ panel is $135. I don’t know how many panels you need. Enersol Solar Heaters | Solarthermal.com
I am thinking the problem here was that the system (if it’s like ours) must be winterized before freezing temperatures.
Good luck!