The more time he can dedicate to growing his wealth bucket, the faster it will grow.If he doesn't have much time or knowledge yet, a syndication for non-accredited investors is good way to learn.He could also put that capital down on a 4-plex and househack.Or find a great partner who has the experience and can put his capital to use in harmony with your friend's investing goals The other options you listed seem too risky if he doesn't have much experience.Good luck 

I use an online rent collection platform (Cozy) and my lease says that tenants must us the platform.

I have a very dedicated team for Demo work and cleanup as this is our strong suit.

It seems like some markets just aren't conducive for the platform. 

Once you get the properties operating like yours it should be "easy" money. 15 is a lot to take on at once, but if you put the right software or processes in place and are diligent about sticking to it you'll be dedicating a small amount of time to them within 2-4 months I imagine. 

Anyone using online platforms for property identification?

Modern code would be for there to be a dedicated 20 amp circuit with a GFCI receptacle. 

Instead of relying on Zillow or other online platforms, order a proper appraisal.

I guess I am starting to loose my patience,I educated myself, read books, listened to podcasts, I know everything about analyzing, I dedicate hours to search every day, I have a great RE Agent also trying to find something in the Minneapolis market but I just can't find the right deal, I've been searching 5 weeks.

E.g. iLevel (if running a fund), or the Yardi / ResMan platform (not very nice from an IR perspective, also minimal data analytics)The above are just a few of the items you will need (and might be already using).