Smoke from incense on a shared duplex back porch- We can't be on porch, smoke comes in - who to sue? Tenant or Landlord?

Is smoking banned in your unit? If it isn't you'll have a real problem saying this is a nuisance.

My husband and I have defaulted on 3 rental property loans (1 conventional, and 2 HELOC). Can we walk away or will we be sued?

You can walk away... but they will definitely go after you.

I *always* recommend an attorney when fooling around with the title to your property. A basic mistake can end up costing a lot in the long run. ...

I don't think we could really answer an "odds" question without a lot more information. You weren't sleeping there... were you there much at all? ...

How do i put my son on my house with my name on it too. house is free an clear

To answer your direct question, you can "sell" it from you to you+your son by just filing a quit claim deed with the appropriate registrar. That...

I signed a real estate contract stating I received $25 consideration. I did not receive any consideration.

Of course it's valid - even if you took it literally, you agreed that you DID take the $25. The $25 is basically a joke. It's legalese for...

Husband only signed "Mortgage" but not "note" or "deed" is he legally responsible any in way?

No, unless there's something I'm missing, he's not a debtor and thus not responsible for the debt.

I wonder if I can be excluded from the increase of monthly maintenance fee in Co-op apt building, as moved in just 3 months ago?

Not likely, assuming they followed proper procedure.

Tree fell from neighbor's yard into ours. We're renting and landlord said they are not responsible to clean up or damages.

Look to your lease for the answer to that. Generally, the LL would be responsible for the fence. The yard could go either way.

Switching mortgage into my name?

Refinance the house.