So if you are in a 30% combined tax bracket you get an additional $3K due to write offs.If it is a rental, you can write off the business expenses and the depreciation on the non land valuation. 

As good as offsetting all his W-2 / Business income?

Of course don't go there just looking for business, you go because you believe in whatever the group is doing. 

But investing is a decision business, do I make an offer?

It's a place to legally go and sell stock/business without capital gains.

I was told by a friend that his dad who runs an appliance business has "keys to every type of washer/dryer coin box".

@ Felipe, If you still manage properties in New Britain, I would like to learn more about your business.

Not incredible, but fine.An out of state flip or flipping business, handled completely remotely? 

Business justification of LLC-B --> This is can be a problem.

That's why I would never had a business partner.