Yes you could sue for something like this.

You have not stated anything that sounds like you have a case. You’re welcome to hire an attorney to review your contract.

Yes you can transfer your rights. What you do not get to transfer on your own are your obligations (e.g. the landlord's and roommate's rights).

Hire a local business attorney. Your issues are well beyond simply asking about a general legal principle (which is the scope of this forum).

Probably a personal injury attorney and also a landlord tenant attorney. But if the guy does not have substantial assets you will likely have to...

This is a very common scam. People have been doing it for decades and you can, unfortunately, forget about seeing your money back. You will never...

Anyone can sue anyone. So yes, you can sue them. Attorneys are not auto mechanics, let alone ones who have inspected your car and the work done,...

You may or you may not be able to. Your post gives zero information on what you mean by "run", or what your sole proprietorship does.

Not much you can do other than make a demand for payment and then sue him if he refuses, which he likely will. You can try hiring an attorney to...

Instructions for small claims court are on the small claims court website. As far as regular court go, you will pretty much need to hire an attorney.