yeah, in the 10 years I've had one, the compliance is just a notice from the "document provider", and a 5500-EZ document annually. the bank, brokerage and crypto exchange accounts have no monthly/annual fees.

OP can also just use the solo 401k's roth balances as a temporary holding place to then pass through directly to the roth ira

The expanded investment options are worth it alone. And the years where there is self employment income, the expanded contribution limit up to doing my own $70,000 employer match saves literal years of contributions off my life.

It's literally 10x what the IRA contribution guys get, and most of them are barely able to even reach the IRA contribution max.

There are more tax deferral plans out there too, I'm willing to do that compliance.