Flip vs "buy and hold"

[Veronica Thomas]

My husband need a tie breaker.  We just purchased our fourth single family home.  It's a total gut job and remodel.  Paid $32,500 for it, looking to put $20,000-$30,000 into it and if we put it on the market in 2 months, get $100,000-$110,000 (this market is insane).

I want to keep it (for a total of 4 rental properties).  He wants to flip it.  We both work full time W2 jobs and are considered passive investors for tax purposes.

How do we decide?