I have used both Traditional (pre-tax) funds, Roth and HSA.

The traditional thing would be for her to decamp and then make her own tearful podcast: How That Bad Man Made Me Do Those Bad Things.  

When you do a traditional 1031 exchange you have 45 day identification period, to provide a list of potential replacement properties and 180 days to close on a replacement.

That's not the topic of discussion - we're talking about saving INTEREST using a HELOC payoff strategy versus a traditional monthly payment strategy.

In many/most BRRRRs that is irrelevant because when the property is bought it is often not fanciable using traditional mortgages.

I'm familiar with how a SFH traditionally sells, and how it is based on comps.

I have helped Dozens of local and OOS investors buy and sell traditional investments, acquire 'house hacks' and STRs, as well as assist OOS investors with tenant turnovers, getting properties rent ready and placing tenants.Reach out anytime to discuss the KC metro and how it fits into your REI goals of providing generational wealth and eventual financial freedom

In a traditional MLS sale, there are realtor fees, there can be concessions, there can be work orders and delays. 

They bring higher tenant turnover, limited cash flow, and attract traditional tenants who aren’t your ideal long-term buyers.

The reason sellers cannot sell these properties through the traditional market is often due to certain issues, and 98% of the time, these issues are not beneficial to you as a buyer.