That 50/50 split for the GP sounds high for me with no skin in the game or minimal skin. 

Especially considering it looks like he bought it for 225k in 2021, with minimal to any improvements.

Partner Driven was attracted to the Preston St property due to its potential for significant value increase with minimal investment.

If you are looking to acquire the other half, there are ways of doing the transfer that minimize capital gains tax for you mom. 

Where can I purchase the medical tools necessary and how do I make an incision that minimizes bleeding. 

The costs of a QI are also often relatively minimal in comparison to the interest and penalties you would pay if it is blown up.You are also parking significant sums of money with the QI - that alone is worth using a reputable QI to ensure your funds don't disappear. 

However, my area of CT has minimal options for multi-family homes.

If you have minimal investing experience then you can use this book as a step by step guidline.

Given the complexity and potential tax-saving opportunities in real estate, it's wise to consider hiring a CPA with expertise in this field.Many clients who work with non-specialists find that their non-real estate preparers lack the specific knowledge to help them minimize taxes through strategies like depreciation, the de minimis safe harbor, partial asset dispositions, 1031 exchanges, navigating real estate professional status, the short-term rental loophole, and more.If you are looking to qualify as a real estate professional, use the short-term rental strategy, or complete a 1031 exchange, I would without a doubt recommend working with a real estate CPA.

It doesn't just teach how to minimize your tax liability.