Need advice on shared roof leak in townhome - most roofers refusing the job

I've been dealing with a persistent leak in my townhome (in Hollywood) that shares a wall/roof with my neighbor. The roof is over 20 years old, and I'm considering a complete re-roof. However, I've run into a significant problem: 4 out of 5 roofing companies I contacted have refused to take on the job.

All of the companies that declined stated that with a shared roof structure, leaks are likely to recur even after re-roofing due to the nature of the shared construction.

Only one contractor agreed to do the work, promising to:

• Handle all communication with my neighbor
• Use a newer "peel and stick waterproof underlayment" material they claim is recently approved in Florida
• 10 years warranty on the waterproof

I'm skeptical since most professionals turned down the job. I've already spent nearly $5,000 on repairs over the past 5 years.

My questions:

1. Is this "peel and stick" solution legitimate, or just a sales pitch?
2. Should I involve the HOA to coordinate a proper fix for entire building?
3. Would it be better to make temporary repairs and sell the property?
4. Any other rabbit holes?

Any advice from those with experience in shared roof structures or similar HOA situations would be greatly appreciated!