What are the biggest challenges people have faced with this.

Of course, these properties are full of challenges so be prepared before you start. 

I only ask because that is, in my opinion, the most challenging part.  

Challenges?

Yep, a recurring theme is that communication from the operators is essential -- especially during challenging times.

House HackAttend as many REI meetups as you can to grow your network of investors for referrals, help through challenges you may incur but don't have experience with, and learn from proven guest speakersNetworking app like blinq to compile all of your contacts for REI in one area with phone and emailbegin conversations with local credit unions exploring what type of loan products they offer

By staying informed and adaptable, investors can find opportunities in both booming and challenging markets.Overall, with careful planning, thorough research, and a strategic mindset, real estate investing can be a fulfilling journey towards financial success and stability.

if he's getting into capital raising to raise 25k or 100k he needs to stay with his corporate job. raise that number by 10x and do something that's life changing. challenge yourself. 

Reread what @Stuart Udis wrote.We can testify to the same challenges after 25 years in our marketplace.We also agree with @Kristian Sexton about starting with a PMC.

One of the challenges of beginning wholesalers is they do not have a buyer's list.