Ok this sounds like something he might appreciate can u modify on this device rebuild your own things etc. and what will one need to buy extra with this? The battery how do u charge them sorry I know stupid questions but I don't wanna waste more money but on what would b amazing for him. I want him to love his device now he just getting frustrated.Most welcome to the forum.
First off, for trouble free vaping you must, unfortunately, be prepared to spend some money up front.
I found VapeClub to have the best prices in town.
My recommendation would be the Pico kit here. It includes the mod and the atomizer.
With that get some 0.9 ohm cCell coils. They are expensive but last at least one month and longer. These coils must be primed well.
Of course you need a separate battery, make that two - one spare for whilst the other is charging. My recommendation here.
And a charger for the batteries. This one is very well priced.
VapeClub has a great selection of local juices. Maybe go through them to see if any appeals. Vapour Mountain XXX is hugely popular. For your husband's taste maybe consider the Polar Mint here.
Hope this helps. Do shout if you have any questions.