So if hypothetically the judge rules in your favor, and your unit's allocation is 10% owner of the association, your 10% is a losing party.Also, many condos are non warrantable.

Rental-related repairs are deductible while improvements are depreciated, and things like mortgage interest, taxes, and insurance can be allocated to the rental side.  

On a $285K duplex, you’re looking at maybe ~$8K–$12K in annual depreciation (depending on land allocation), plus interest, taxes, insurance, etc.

Using 10% down vs 20% can help cash flow since your mortgage is smaller, but it also increases your monthly payment slightly.Tax considerations – Since you’re not active RE professionals, bonus depreciation may be limited, but renting out a second home could open opportunities depending on your AGI and rental income allocation.

I'm 22 (just getting started with my investing journey) and I'm trying to figure out the most optimized way to allocate my funds, but I'm having a hard time balancing retirement investing with saving for real estate.

…Why This is ImportantAccurate data is extremely significant for businesses so they can make informed decisions on hiring, allocating capital, investing, research and development, etc.

It really depends what resources you can allocate towards off market deals.

In addition, I am unconvinced that the rental has positive cash flow even at $2100/month rent (meaning I am pretty sure it does not) when properly allocating for all expenses (PITI, vacancy, maintenance/cap ex, PM (allocate for pm even when self managing as your time has value), HOA?

You can allocate money for a down payment and also put money towards your 401K.

When you purchase a mobile home park, you typically don’t own any vertical buildings—maybe a clubhouse, but that’s usually a small allocation.