For example, using 70-80% leverage could preserve your cash for more deals while maintaining strong returns.A blended approach might work: pay cash for smaller deals to avoid delays and borrow on more significant properties to spread risk.

I use standard market PM rates in my underwriting, but I also would not work for those rates but it is fair compensation for the work.I typically use vacancy of 5% not because I have ever had a unit that had that high vacancy but I do not have a no payment category and I want the underwriting to be conservativeon the opposite, your rate is a bit high and your appreciation rate and rent growth are modest.overall, seems like a decent attempt at an analysis.  

When the whole covid shutdown occurred, I dropped out of college to help my father's service business maintaining and remodeling residential and commercial buildings.

If OP can lever-up while maintaining adequate reserves, he will be in better position than buying with heavy cash position.  

While I do maintain a relatively modest percentage of my assets in money market instruments, corporate debt funds, and high dividend stocks, I remain most comfortable with the investments I specialize in and know best.  

I was thinking of starting a rent increase for my 1 bedroom tenant voucher due it being low and well under fair market value(Based on  hud and zip code) but my tenant is in the process of having a caretaker for her disability and getting approved for a two bedroom voucher.

Owning a duplex at 20 is a huge accomplishment, and it’s inspiring to see you’re already planning your next move.From my perspective, real estate investing is a long-term game focused on building equity, paying down debt, and maintaining stability over chasing short-term cash flow.

Small is easy to maintain as long as renovations were done correctly.

Your brokerage is required to supervise you, and maintain all records of the transaction, just like any other client. 

There are also additional costs of operating and maintaining an LLC, like separate bank accounts, annual report filings, tax filings, etc.2.