Currently, I'm moving to self storage because I like the business model and can see myself running these when I quit my W2 job (software sales) here shortly. 

Even with management software, you still have to run a business and be as good as or better than your competitors.

That is usually confirmation from your banker, your bank account with the account number redacted or a letter from your lender. 

There still is a tendency for DSCR Loans in particularly to get lumped in (throughout securitization) with other "Non-QM" loans, mostly owner-occupied when they really shouldn't be in my view, further a lot of the "tech" and software, systems buildout (including loan doc generators) are based on consumer resi which creates a lot of headaches.Anything rehab/construction related though (which is what the original post appears to be more about) is a different animals though - experiences are likely to vary markedly by market, lender, bank etc quite a bit

I am already registered and trying to just confirm my registration, events, etc.

I believe I’d need to live there for at least 2 years and hold the property for 5 years but would like a confirmation if possible?

(Confirming in advance that I understand any reply from you isn’t legal advice.) 

Basically its no different than applying for any other mortgage, the lender wants to underwrite the loan to confirm your ability to repay.

If you want to keep them, make sure they are 100% honest about their intent, check zoning to verify they are allowed in that area, charge them market rate, and confirm they are insured to protect you and the property. 

I got VERBAL confirmation on several occasions from the turnkey company's acquisition team that upon closing, the property management team would hire a lawn care company to mow and water the new sod while the property was vacant.