I would have thought, Alexander, that the answer is patently obvious. We are living inside a black hole. As you well know black holes are formed almost instantaneously at the moment sufficient mass is accreted at a central point.
Black holes, like turtles, go all the way down, so there's no need to investigate further that aspect of the universe, other than studying our own black holes so as to refine our understanding of the phenomenon.
The reason the universe continues to expand is a result of the additional material which is falling into our space from 'outside'. From our viewpoint within this part of creation it appears that the space we inhabit is expanding. By that I mean that someone outside our frame of reference would see it as an increase in diameter of the event horizon.
With me so far? If you are, I'm glad 'cos I'm not too sure that I am.
Now, the speed of light and the red shift mirage. Light speed is not constant, even though it seems to be from our perspective. The photons (or waves) which constitute what we call light is affected significantly by the internal pressure of our black hole and the number of baryonic particles produced, even though briefly, on the path between us and the observed objects. This means that the further away an object lies (in a geometrical sense) then the slower light becomes. This is complicated by the introduction of mass in the area in which a measurement is completed.
As it happens - just like the moon is of sufficent size to just eclipse the sun - measurements of light speed within the vicinity of our sun are affected to the point where they match the readings of light speed we get when we attempt to measure the speed of light from external sources. This, of course, means that we are making false deductions from our observations.
Not wishing to labour the point (?) a slower light speed will exhibit the same characteristics as an expanding universe. Right? I'll let you extrapolate that thought without further explanation.
'Pressure within the universe?' I hear you ask. Relate it to air pressure. You live constantly within an atmosphere which exerts a pressure of around 14 pounds per square inch of your body. Do you feel it? Didn't think so.
That's the end of Dujon's first lesson in the TOE.
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. On top of everything else it is a giant leap of faith in my personal view. To me I would rather the start date for the big bang start be moved back so we can have things growing at a rate within my comprehension, the background radiation map makes that now impossible I would think. 
