Ok I've never kept day geckos so the best I can do is:
HOUSING: - the enclosure you've found is the right size based on care sheets
HEATING: I've given you my opinion on heatmats so I'd recommend looking at a different heatsource.
Make sure you get a thermostat no matter what heat source you choose
LIGHTING: It looks like they need full spectrum UV bulb but I could be wrong.
HUMIDIDTY: I don't think you need a fogger - the humidity they require can be achieved by spraying a couple of times a day. Put a basic hygrometer in the tank and if humidity regularly drops below 50% and you can't spray it in time then get a fogger. But between the two of you I can't see your hours being that much of a problem.
Some day gecko expert will hopefully spot this thread at some point
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