No matter which depreciation method you choose, you will need to allocate part of the sale price to the tub, using its fair market value at the time of sale, as correctly suggested by @Christopher Smith.

My sole focus is to trade expenses of my rent into mortgage ASAP and then use everything else for heavily investing in real estate. 

Hello, first time poster and newbie to real estate here.I own a SFH with my VA loan in Sacramento, CA. I am looking to work with an experienced flipper in exchange for capital on a flip. I have equity to pull from my ...

We are interested in Buying a Multi Family to rent and generate cashflow but we are also Interested in the BRRRR method.

They will be your best friend and connect you to trusted trades that they personally have used. 

@Di Ye Whatever you do and whatever your method of screening... you must remain consistent!

I'd like to draw out equity to purchase another as I'm now starting to follow the B,R,R,R method (to some extend - as I learn more).

See if the seller will consider owner financing.There's a book in the bookstore that has a variety of creative methods for purchasing property when you don't have a lot of personal funds.

If by cash upfront you mean someone wants to pay a year in advance or something similar it sounds like you are making a trade off for someone with bad credit. 

Since I've been here I know a PM and some trades folks for issues that could come up.