For the project I plan on creating a system to address every aspect, step-by-step, of increasing the value of multifamily properties by making improvements that increase each property's net income.

Welcome to BP community @David Horton  It is a great place to meet new friends and learn about various aspects of real estate and more. 

@Karolina PowellA lot of people have mentioned different aspects of this in their posts.

Some people dont even intend to get that many however if you are trying to maximize 10 from each partner/person then you'd try to qualify and hold title separate for your own 10 prperties (10 + 10 = 20 total properties).You can also look at credit aspects as well but typically lenders will use the lowest of the 2 middle scores (3 scores per person but will use the middle score).So the most important aspects are the income to qualify for the loans in the case of full documentation loans.

They don’t sell off their mortgages so I will always have a local connection in case I need assistance with the loan or any other aspect of my business.

Student debt usually come with a low interest rate, a rate you should should be able to beat with even a decent investment thereby making it more worthwhile to invest and just pay the minimum on your student loans.Of course, there's also a mental aspect to this.

@Salvatore D'Agostino When choosing a cost segregation firm, it's crucial to hire a reputable company.

Don't forget to familiarize yourself with local laws and regulations; hiring a local attorney can help navigate the legal aspects.

A mindset of patience, perseverance, and learning by doing is crucial.

Speed of Financing: Time is crucial in fix and flips, and traditional loans (like bank loans) can be too slow.