where can I buy a cake stand that holds at least a 4 or 6 inch cake on top and 50 cupcakes , been looking online and its so expensive

Make your own. I used cardboard cake rounds in various shapes. For the supports underneath, I used foam core cut about 3 " tall and long enough to go across the middle. I put them in an X pattern (making a notch in the middle for the other one to slide into) Secured the legs to the board with glue gun. To stack them - I used straight pins through the legs to the board beneath. I tried glue, but I couldn't get it placed correctly.

I covered my boards in decorative paper before I started and used white foam core. The edges I trimmed with a rick rack that I cut out using my Cricut.

thank you for your help

I'm planning on making one next weekend using graduated sizes of 1/2" cake drums (8"/10"/12") and putting ribbon wrapped empty frosting containers in between. Saw the idea here a little while back, I'm dying to see how it turns out as it is way less expensive than buying the cake stands! Sorry it doesn't help you today but I'll post pics next weekend!

I got mine from
http://www.efavormart.com/

they are way cheaper than other online stores & you can buy it as a stand or even pick the tiers you want...Mine is from 6" to 18"