Not familiar with mifi.. But if your just looking to record or monitor locally you don't need Internet access... All you need is ip camera, router and any computer for storage and viewing and if you want to get fancy I recommend Blue Iris software..
I have a few camera set up now... When I go to CG that has wifi I can monitor everything via my Phone..( even get sent pictures when someone approaches the MH.). When there is no wifi I can still access and record via my phone/ or computer but. Need to be within few 100 ft of the router....
2010 Georgetown 300FWSSouth Florida