One thing to note is that most DST’s are loaded with a ton of extra fees (sales commissions, etc), so they may not make such a great first option.

ARM loans, unless you pay a ton extra every month so that when it adjusts its not a shock, I would stay away. 

I don't know many flippers that would be okay risking $300k to earn a $15k profit.

You will have to pay higher property tax and utilities and maintenance will go up a bit but the extra unit is well worth it because you'r essentially upgrading for free.You need to take into consideration the closing costs of selling your house, buying the 3 fam, and mortgage for the new house.

-One that works with you ahead of time to make sure you can keep as much of your earnings as legally allowed. 

They charge 10% monthly rent, an extra 25% for the lease signing, and 5% for a yearly removal. 

Like if now they pay an average of $50 in electric but I get panels and say I'll cover electric for an extra $25, that is a $25 decrease for them and possibly covers the added cost to me which over time gets paid off and an added benefit for new renters going forward.

That's what I did.You can hear more about my story on a podcast episode I did with Joe Fairless that goes more into detail.If you really want to go the extra mile with this concept, you can evaluate yourself with a free DISC assessment by Tony Robbins or some other personality assessment tool.Good luck...

do they charge any extras?

The only issue with the double close in my opinion is the extra closing cost and the need to use your own money even temporarily.