Hey @Marc Shin, do a quick search and you will find a lot of info on this topic.There are ways to get it done.

I recommend you do a google search for "real estate seller financing" and educate yourself through some blogs, then have a conversation to see if the two of you can agree on terms that work for everyone.Be sure to use an attorney to draft the documents, not the same one the seller uses.

I appreciate your thoughtsSorry for another question, I still beginning my searches about this subject, in this case do you have a LLC holding managing all other companies or all of your companies are totally independent?

You can also check meetup.com or search Facebook for real estate investment groups, clubs, or meetings in your area. 

All the best as you continue your search.

Are there more buyers than houses available in the neighborhoods you're considering?

Anyone with more than a single property may be interested in adding another and represent a cash buyer.Bandit SignsBandit sign campaigns is run in almost every neighborhood, and many people don’t realize that they are a great source for finding cash buyers.

For your strategy to work you have to focus on markets where there are strong indicators the C neighborhood can transition into a B neighborhood.

Appreciate the recommendation to look by neighborhood vs zip.  

Reinforce entry points with security bars, and consider a monitored alarm system or joining a local neighborhood watch for extra protection.