Many many Universes

Are you saying that there are many universes?
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If by ‘universe’ we mean ‘all that exists’, then obviously there can only be one, and there can be nothing outside it. 
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But the infinite universe consists of countless finite universes, worlds, objects, and entities of every conceivable size. 
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The infinite totality of all these worlds or systems makes up boundless space. 
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The theory that space popped into being out of nothingness in a ‘big bang’ a few billion years ago and then proceeded to expand to its present vast but supposedly finite size cannot be taken seriously. 
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Nothing comes from nothing, and if space is finite, where does it end and what lies beyond?
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Big bang theorists claim that space might curve back upon itself so that it is both finite and boundless.
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But this is clearly just an illogical, mathematical fantasy. 
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It’s much more reasonable to assume that the universe is boundless, beginningless, and endless, but subject to constant transformations.
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Does the infinite universe have concrete existence?
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Only things that are measurable can have concrete existence.
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Iinfinitude is immeasurable and is therefore an abstraction. 
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An infinite universe basically means that there are literally numberless finite, concrete, substantial systems.
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Which continue limitlessly and endlessly in all directions, inwardly and outwardly.
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David Pratt