I'm 16 years old and I'm planning to invest in real estate when I turn 18!

I am planning to get a cashout refi, which I believe I need to move it solely into my name first, but there is also a prepayment penalty attached to the loan for the first 3 years.

I would suggest taking out what's called a home equity line of credit and use it to invest in more real estate but make sure that you have a mentor that has done at least 100 times what you are planning to do and follow a strategy that works for you.

You should bring the lender your 'business plan' for your rad therapy business.

I plan to start BRRRRing some properties as well as continuing flipping. 

My understanding is the form itself is alerting the IRS to the plans of a 1031 exchange. 

-You will need to select a room option that has 2 adult occupants if you are planning on bringing another adult with you.

Not only the management aspect they'd be providing but it would allow you an opportunity to "learn on the job" for when you plan on managing it yourself and also give you context for questions that you may have and someone to ask them to.

One competing property should never derail your plan. 

That sounds like a great plan.