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

I have 3 under my belt and using Excel to track all the P&L.

Seems like you have no limit on options, this is really a strategy choice.

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.

Many insurance policies have basic coverage and premium coverage options.

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.

Are there any apps you use or do you handle it all on Excel?

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