Would love to get some feedback on this strategy I just did: Instead of waiting 30-45 days to secure a regular conventional loan to purchase my rental property, I decided to get an unsecured loan from the bank instead.

I paid cash for the house (approximately $15,000) and then took out a loan from my bank for $20,000.

If you go owner occupied the bank you go with may have a renovation loan you can take out as well or you could do private lending if a renovation loan is not an option for you.

as contractors will be raking in the majority of your profits.Work slave job with W-2 documentation for 2 years to gain favor with banks.

I've been saving up money and have been disappointed in the bank interest and thought there has to be a better way. 

There is a reason most banks will not lend money for properties under $50K. 

You have to provide the financing for us to buy the new property - either from cash reserves, a private loan, or a loan from a portfolio lender like a community bank.

Maybe a finance-related position with a company in the real estate space like a construction company or a bank / mortgage company. 

not really, but if it's a smaller bank then that explains why they are staying so tight.

I believe you have to request to join, but as long as you explain they'll let you in.