Meanwhile, I'm also going to be getting my license to sell.

You also may get tripped up by other things like proper support in the structure, ratio of windows to the buildings envelope (I'm not as familiar about this but have heard stories), etc.For some properties this added cost and hassle may be worth the investment to change the use from residential to hotel.

Hi this awesome BP community,I had been interested in real estate since 2014, bought my first home in 2016.03 and got my California real estate agent license in 2018.05, have recently studied through many classical books regarding real estate, looking to get started in real estate investing!

You can certainly enter into a contract before it goes through the process usually contingent upon Sellers obtaining a license to sell. 

I am here to learn as much as I possibly can and I believe they way I would like my path to go that a license in WA is a good move for me to obtain.

Would I need a commercial real-estate license to operate it?

I know that evealuating mulitfamily is based on income but if he os not able to provide proper financials what should I do?

You don't need a real estate license to be an investor.It would actually cost you money to hold a license and not actually use it.To get access to the local MLS, you have to pay money to the local Realtor board.

You need to talk to your professional about your income level, goals, and future expectation to draft proper depreciation election if available.  

Usually, just their ID such as a drivers license.