I can see your problem with the guns you have listed.
There is a solution, but you may not like it. First there's only one Ithaca, the gun is not happy being by it self, Ithaca's are also made in 16ga., and 20 gauge. Second the Remington 1100 why just the 1100, get a 870. The earlier 870 Trap model can be found at good prices, everyone wants the (yuk) new stuff.
There are three SXS's not one O/U nice buy's on good guns can be found, you NEED a O/U.
You do not have a hoard YET.