Looking at a reverse mortgage foreclosure that will sell on the courthouse steps.

If I build a duplex for $400k and sell one side for 300k can I avoid capital gains if I roll that 300k into the mortgage resulting in a 100k mortgage for the other half of the duplex?

I also plan to categorize out the following as best I can: materialscontract laborholding costs (mortgage, utilities, hoa, etc)investor costs (travel)money costsclosing costs (purchase)closing costs (sale

I've found that for tile, the big box retailers Lowes and HD have a smaller selection from what's on display but are much cheaper than the specialty stores for a similar quality of flooring. 

@Willie MoralesIn defense of your lawyer, look at what actual mortgage and loan documents say.

Will be cheaper due to not having to go through the entire refinance process, documents, contracts, ect. 

Throwing cash on a mortgage is a waste of cash if you intend to keep it as a income investment.

I would assume the bank wants some type of financial history for the LLC to even consider offering a mortgage.

My tenants will pay my mortgage for my primary residence. 

You will have to show mortgage company your bank records.