Roy,
The current Verizon plan costs $10/month for your MiFi and $20/month for each smart phone ($10 for a dumb phone). The MiFi and the phones then share of data plan with 3GB shared going for $36 (normally $45) and 5GB for $48 (normally $60).
So 2 smartphones and a MiFi $50 plus your data 36 o5 48 and you are all in for $86 or $98. Not sure what has the unlimited data or how you use it but this is assuming you are looking to gear down, save some money and eliminate the unlimited plan. If you are not under contract, they will absolutely be raising your current unlimited data plan by $20/month.