Cost should only be an objection in the absence of value.

My personal suggestions would be to have a discussion with your partner to learn what objectives need to be achieved with the agreement and then have that discussion with an independent attorney who specializes in business law.

Your goals and objectives needs to be considered. 

The main obstacle to success for most people is that they're always ruining after the latest shining object and don't focus.

And the fact that the reply would be very different depending on the country doesn't help.The first question though is always to start with your objective.

Objectively speaking, I do not believe the daughter-in-law of the builder will have your best interest at heart.

If present, take them out...unless of course you like unclogging corn cobs, beef/chicken bones, potato peelings, grease and a fair number of unknown but really smelly other objects from them and your kitchen drains.2.

@David Song This really depends on what your objective is but if it's cash flow, you're not going to find it in CA as you're seeing.

Beware of shiny objects.

I would like to leave the existing doorway and framing in tact.The main objective is to reduce the noise between the two rooms.