Any thought of if I could make some "pocket money" selling them on
ebay
or something? I am not looking to get rich just get some pocket money
enjoying what I do. We have just had our second child and money is
hard
to come by!

Sure you can, step one would be to have a small webpage, there are
several like geocities,tripod.com etc which offer free webpage
templates and hosting. There you could put up either the designs or
some photographs of the end-product.You can then research on how to
become an ebay store and then put a few up for grabs.
Even the big antenna makers like antennawarehouse.com work like
this...they do have a direct webpage from where you can buy stuff
directly or you can buy via their store on ebay...

-Nick
P.S.:and if you can take custom orders,that should enhance your sales
too.