Can I sue a home invader?

Yes, you can definitely sue him if you'd like.

We can't answer without reading the lease.

Is it common practice that my lawyer doesn't respond to my calls or get beakc to me for two-three weeks

No; you should get faster responses than that. This is especially the case if you need to get a preliminary injunction of some type.

I retained my lawyer based on his exp. Then, he brought his son (5 yr exp) to visit the disputed property and boublebilled me

You shouldn't be billed for the son's time without clear notice in advance.

Is there any legal protection in an at-will work environment for employees who experience a hostile work environment?

Employers may not create a hostile work environment. This prohibition applies to at-will employees. However, it can be quite difficult to prove.

You don't have to move out. The landlord will have to remediate if you stay, unless they can get a temporary exemption. For example, if there is...

If I have mold in my apartment do I still have to pay rent if my landlord is not correcting the problem? Also lead with kids?

First, protect your children and yourself; lead poisoning can be fatal. Second, contact the local board of health and request an inspection.

Is a town bylaw to limit a business to only be open 18 day a year legal?

It depends on the wording of the law. In many cases, flea markets are given special exemptions from the normal business rules. For example, a...

In Massachusetts, to which court do I file papers to dissolve a joint tenancy of an account in stock holdings?

This question isn't clear. Can you be more specific?

I am currently suing an attorney for mal practice. I'm hoping to win but there's always a chance that I won't. That means that

You may or may not be able to protect the money; we don't know the details. I suggest you contact an attorney for help.