I have probably more options and ideas than you want, lol. 

Send me a message and we can schedule a short phone call and I answer any general questions you have and hopefully get you going.Another option is go to one of your local auctions and talk to people bidding on properties.

I was thinking option 3 made most sense and also not sell any of them since they cash flow and have been able to get new tenants fairly easily or have had long term tenants.

If I'm in your shoes, I'd recommend interviewing and meeting with different brokers across the spectrum to get a good sense of which option is right for you.

You have a lot of options with fourplexes which is why they are so popular to buy. 

An alternative option is a solo 401k if you’re self employed with no w2 employees other than a spouse.  

What I have seen is that many new developments might be an option here. 

@Rashid Khalil, not a good approach in my option for a bunch of reasons. 1.

You can do options on stock but you can get calls.  

Hey Nick, There are 80% LTV cash out options on some DSCR products.