Most lenders allow you to vest individually or as an LLC.

@Steve Smith Passive Allowed Losses

Many people set target amounts for both of these to allow for 20-30 years of retirement (however many years are needed). 

A syndication will give you a good return on your investment and allow this to occur without you needing to put in any actual work.

So, if the HOA doesn't allow it, its between you and the HOA. 

By building a home, you have the potential to increase the property's value, which could allow you to sell it for a profit or use it as a rental property to generate income.

He was living there with his mom and you allowed it.

She allows you to take a few bites from here and there.

The best option would be to partner with an agent that is investor friendly, which would allow you to have a professional that can give you good insights.

Even the narrowest without garages might be 12 units per acre. mixed use is complex and you need a commercial agent. that's a small plot for mixed use. if you don't have a lot of experience I'd recommend talking to the city first about permitted uses within your zoning and what they may allow variances on for development, check your height restrictions first.