Am I missing out on other options? 

Calculator should provide amount of conversion  tax payments needed, one or multiple conversion options,  Medicare IRMAA impacts, various investment percentages of Roth growth vs IRA growth, and RMD amounts with associated tax bill.I’ve seen numerous CFPs hawk their services for $5,000 or more.  

So lots of options for investing. 

Since you're selling 8 SFRs, this could break up into multiple distinct exchanges (most likely), but you have the option of combining multiple sales into single exchange purchases. 

We suddenly had 2 homes and began exploring what our options were and that is when we discovered the intriguing world of REI and tapped into Bigger Pockets and Better Life Tribe, etc. to begin our education.In the time since his death and the probate process we have been paying his mortgage off and selling items from the home which we have been maintaining.

Do I have any other options?

The self serve option is hit or miss, I wouldn't use it in a city with strong squatters rights.

You will then have a few options with that rent money....you can put it into principal or you can start saving it to purchase yet another property.

New builds have been a fantastic option recently because they HAVE to sell their inventory no matter the market conditions. 

Additionally, what factors typically increase bankruptcy risk for leveraged investments?