Here's a list of things to track:- Formal lease application- Formal signed and executed lease specific to your state- Payment history (I recommend using online rent collection like Apartments.com, RentRedi, etc)- Maintenance requests and receipts- Accounting for all rental-related expenses (repairs, utilities, etc) The more you treat it like a business, the more helpful you are to your CPA come tax time. 

Another lesson is to research companies online and in forums like this before you do business with them and if you decide to do business with someone, dip your toe in the water slowly and continue to research the company after you start working with them, because things can change quickly.I have some questions:1. 

In-person interactions are great for building trust with potential investors.Real Estate Platforms:BiggerPockets: A robust platform for connecting with private lenders and investors.Fund That Flip, PeerStreet, Groundfloor: Online platforms connecting investors with real estate projects.Social Media Groups: Facebook and LinkedIn groups dedicated to real estate investing often have private investors or lenders looking to connect.Personal Network: Often overlooked, but friends, family, and colleagues may know individuals interested in investing.Private Money Brokers: If you're working on wholesaling deals, you may find brokers who have established relationships with private money lenders.Real Estate Agents: Some agents have connections with private investors, especially those focused on investment properties.For your 50% LTV, it's good to approach investors who may be interested in lower-risk, high-equity deals.

I am not finding much material online or a book to study from.

Start by networking through local meetups, REIA groups, and online communities like BiggerPockets to connect with experienced investors.

There are some great on-line real estate courses, and I have found the information within them has really been helpful for my investment business.

There were weekly group video phone calls that despite usually only having 5-10 people online I could never get a question answered leaving me to believe they were pre recorded.

I saw this online the other day.

 try one of those online sources like prosper etc. 

Also just look online and steal some ideas...I used to Google Luxury Kitchens and then figure out how to do the same for less $$.You'll be fine with your experience.