I would tell the tenant only that she is obligated to follow local noise regulations and if she is doing this she is fine.

One thing I’ve been questioning is if the government will ever seize properties in the future or put restrictions in place making it nearly impossible to profit from rentals.

Lopriore, Jr at FATCO  Read everything you can about time lines, new government pushes to take away or reduce 1031, and the hardest part in today's market is the replacement property as listings are few

The Secretary of Housing and Urban Development is both the owner and plaintiff and seeks to recover possession in order to vacate the property prior to sale and has complied with all tenant notification requirements under federal law and administrative regulations.13.

You state regulations should guide you.

If you've tried to reach them, and your agent, and neither are responsive at all, you may want to contact the local Realtor Association or state licensing/regulations department that issues, renews and oversees real estate licenses.

There are regulations about how long need to live in a primary residence before you can qualify for another primary residence mortgage--it's usually a year.

When that has been issued and the problem still occurs you could pursue other more extreme measures related to removing them from the property (per your local regulations for eviction/non-renewal/etc) or charging a fee if it's allowed.Finally, have you read through your local landlord/tenant laws?

According to the NJ government website, the tenant can except in certain circumstances (eg emergency).

It allows some regulation but no bans...