While this is a lot of money, most any mid-career professional likely has that available to invest (maybe not liquid today, but in general).  

I may be into the hundreds of landlord/tenant cases at this point in my career.

@Tyler Bilinovic my opinion is to get an accountant earlier in your investment career because your savings compound.

Quote from @Melanie Baldridge: If you think about your career and your journey to build wealth over a long time horizon, this is still the strategy that I like most:1.

For example, you must search for new suitable tenants and continue to make monthly loan payments.

I do agree the conservative W2 earners who go about their careers responsibly setting aside retirement funds are best suited to be LP investors but I do not believe most syndication students are deciding between trying their hand at being a GP and making an LP investment.  

As I am winding down my baseball career, what should I be doing so that when school and baseball end, I can jump right into real estate full time!

.- **Commercial Loans**: These are more suitable for larger multifamily properties like yours.

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- Are there alternative financing options, like private lenders or hard money loans, that could be suitable for someone with fluctuating income?