Building a tax advantaged retirement plan...best ways to invest extra funds...

[Pixel Rogue]

Building a tax advantaged retirement plan...best ways to invest extra funds + smart exit strategy from rentals.. We may decide to return early...

We are looking to build a retirement that minimizes tax obligation, lowest future tax bracket. Here is what we have, and/or are planning:
• Retirement savings are Roth across the board. We max opportunities annually. If this doubles in 10 years, all good here.
• We will likely do a 1031 of an investment property to a primary forever home, renting it out for the first few years
• Funds from sale of primary home, likely municipal bonds as best tax advantaged options? - might be able to this to 1m w/savings.
 (what other options here, that keep from paying future taxes)
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Investment properties (looking forward to less landlord/maintenance hats, less tenants.) 
- Considering creating a company to manage each of the investment properties, charging a monthly fee which is then active income that can be transferred to tax sheltered investment (ie Roth) (as this exit plan will take a while)
- Thinking of 1031s to crowdsourced investment opportunities that accept 1031s, then in a few years convert to REITS then cash out. 
- Another option but not caring for what I'm learning, DST...low rates of return and seem secretive in how they are established..and private.
- Thinking of setting up a trust, and assigning the trust as president/member of each LLC.
  (would that work, no need for change stop financing, transfer fees etc?

Appreciate any responses, especially from those who are not seeking new clients or promoting a book.