I'm glad you'll provide it. Most information on UVB is outdated as most people assumed because most frogs and toads are nocturnal, they would not be exposed to it. However, frogs and some lizards such as leopard geckos have thin skin which allows them to absorb a great amount of the Rays in a short period of time. Whereas thick skinned lizards like bearded dragons can handle it for most of the day. Tree frogs sleep exposed on leaves or branches and will therefore be exposed to UVB and so even if they didn't need it should still be provided as good husbandry, to recreate the natural habitat. Truth is there's lots of research to be done and there is going on at zoos but some information now is pointing to a lot of amphibians do use or partly use UVB. Arcadia reptile lighting are very forward thinking and I'm sure you'll read a lot of cool articles on their website or from John-Courtney smith.
Crickets wont escape aslong as you are careful and adults are usually easier to deal with and less likely to, which at one point you'll be using. I doubt you'll be infested with crickets, I've never had a problem and I have loads of crickets.
There are several articles online that will probably advise on how big of housing you'll need for them but with the breeding, just put a heat mat under and it will keep them warm cheaply.