I sell mugs both FBA and FBM
Both a financially worth doing but I get better profits from FBM.
Sales of FBM are much, much better than FBA so I don't think visibility is an issue. It's more a case that there are a few Prime members who filter out FBM items but at this time of year this is minimal impact on sales.
Of course, at the moment Amazon are not paying their sellers due to technical issues. It's now into the 2nd week and Amazon can give no indication when they will start paying sellers.
So it's your choice of making no money on FBA or making no money on FBM :)