One of the benefits is that being on the loan can help build his credit, which will be valuable for his future financial goals.

And I will go outside, and when I hear the noise, I will look at the home itself and start listing the things I love about it.

WE all get paid at the same time when the property closes I get my money back and my agreed on captial partner split they get the rest.. for some it works great we help them scale.. for others that just do a few a year and are dialing for absolute cheapest rates and have the money for downpayment and to make payments etc.. thats the route they will go usually broker who is putting them into a large lenders program and raking points off the top and at closing..

You're on the right track to reach out for help here and also to look to your area for potential partnerships.

If you would like to avoid that process, then you can either close with a portfolio loan or DSCR, and just vest title in your LLC from the beginning @Lau Cor. 

What can be the disadvantage to keep it aggregated in the coming years?

The goal of CF is to recover the cash the REI puts in. 

This will help guide your decision opposed to investing somewhere for a novel reason.for example for me it was cash flow, price to rent ratio, land lord tenant laws and availability of multi-families(Just to name a few). 

Welcome to BP @Carl Conley :)If you are already familiar with the construction side of things, real estate investment might seem easier for you :)Start with the BP podcast sessions, I learned lot from those sessions when I got started.

It's a local investor meetup that meets on the first Tuesday of every month.